Prática de Shadowing: Mosquito Life Cycle and Disease Prevention - Aprenda a falar inglês com vídeo
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They're small.
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They're mostly silent.
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But they're the deadliest animal on Earth.
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Not because of a bite that causes an irritating itch, But because of what that bite can carry,
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mosquitoes spread diseases like malaria,
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dengue, Zika, and West Nile virus to hundreds of millions of people every year.
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That's why understanding how a mosquito grows, feeds, and behaves isn't just biology.
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It's the foundation of how scientists track outbreaks, design solutions to stop the spread of mosquito-related diseases,
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and identify weaknesses in their life cycle to control their populations.
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Stage 1.
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Egg.
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It all starts with water.
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A female mosquito lays her eggs on the surface of stagnant water, a pond or puddle, a clogged gutter, an old tire, a container,
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or even a flower pot left out after rain.
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Many species lay eggs in rafts of 100 or more.
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Others lay them one at a time, just above the waterline, built to survive drying out and hatch later when it rains.
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Within a day or two, given the right conditions, the eggs hatch.
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Stage 2.
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Larvae.
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Hatching from each egg is a mosquito larva, sometimes called a wriggler.
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It lives entirely in water, breathing through a tube at the surface while it feeds on algae and organic debris below.
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The larvae molt several times over about a week, growing bigger each time.
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This stage is a major target for control efforts, since larvae can't leave the water,
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which is why removing standing water is one of the simplest ways to cut mosquito populations.
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stage 3 pupa next comes the pupa
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or tumbler a comma-shaped stage that's mostly inactive
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and doesn't feed at all though it can tumble toward the bottom in quick bursts
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if disturbed like the larva before it the pupa still depends entirely on water to survive inside it's undergoing metamorphosis,
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a complete transformation of its body structure from an aquatic, worm-like larva into a flying adult insect,
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much like a caterpillar transforming inside a chrysalis.
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This only takes one to four days.
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Then the skin splits and an adult mosquito climbs out onto the water's surface and takes flight.
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Stage 4.
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Adult and feeding behavior.
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Adult males live only about a week, feeding solely on nectar and plant juices, making them harmless to humans.
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Females can live weeks to months, and they need a blood meal to develop their eggs.
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That's the critical link to disease.
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When a female bites an infected person or animal, she can pick up a virus or parasite and pass it to the next person she bites.
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This is exactly why scientists study feeding times and preferred hosts for each species.
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Some bite at dawn and dusk, others bite at night, and knowing the pattern shapes real prevention strategies.
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Thank you.
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Thank you.
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Thank you.
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Thank you.
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Vocabulário e dicas de fala para esta lição
Este vídeo tem 44 frases e 465 palavras para praticar shadowing. A fala dura 6:10. O falante fala devagar, cerca de 75 palavras por minuto, o que dá tempo para imitar cada som. Apenas 71% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.
Vocabulário principal deste vídeo
15 palavras menos comuns do vídeo, com pronúncia e significado:
- mosquito /məsˈki.toʊ/ (substantivo) — mosquito, melga. A small flying insect of the family Culicidae, the females of which bite humans and animals and suck blood, leaving an itching bump on the skin, and sometimes…
- bite /baɪt/ (verbo) — morder. To cut into something by clamping the teeth.
- egg /ɛɡ/ (substantivo) — ovo. An approximately spherical or ellipsoidal body produced by birds, insects, reptiles, and other animals, often housing an embryo within a membrane or shell…
- hatch /hæt͡ʃ/ (verbo) — eclodir. To emerge from an egg.
- virus /ˈvaɪ.ɹəs/ (substantivo) — vírus. A submicroscopic, non-cellular structure that consists of a core of DNA or RNA surrounded by a protein coat, that requires a living host cell to replicate, and…
- scientist /ˈsaɪəntəst/ (substantivo) — cientista. One whose activities make use of the scientific method to answer questions regarding the measurable universe. A scientist may be involved in original research…
- meal /ˈmiːl/ (substantivo) — refeição. Food that is prepared and eaten, usually at a specific time, and usually in a comparatively large quantity.
- silent /ˈsaɪ̯lənt/ (adjetivo) — silencioso. Free from sound or noise; absolutely still; perfectly quiet.
- flower /ˈfloʊɚ/ (substantivo) — flor. A colorful, conspicuous structure associated with angiosperms, frequently scented and attracting various insects, and which may or may not be used for sexual…
- organic /ɔːˈɡænɪk/ (adjetivo) — orgânico. Pertaining to or derived from living organisms.
- juice /d͡ʒuːs/ (substantivo) — sumo, suco. A liquid made from plant, especially fruit.
- tube /tuːb/ (substantivo) — tubo, bisnaga. Anything that is hollow and cylindrical in shape.
- prevention /pɹɪˈvɛnʃən/ (substantivo) — prevenção. The act of preventing or hindering; obstruction of action, access, or approach; thwarting.
- dawn /dɔːn/ (substantivo) — alvorecer, alvorada. The morning twilight period immediately before sunrise.
- breathe /bɹiːð/ (verbo) — respirar. To draw air into (inhale), and expel air from (exhale), the lungs in order to extract oxygen and excrete waste gases.
Phrasal verbs que você vai ouvir
- pick up (verbo) — pegar. To lift; to grasp and raise.
Pronúncia para ficar de olho
O falante usa 6 contrações e formas reduzidas, como they're, can't, doesn't. Diga-as na forma curta, do jeito que você ouve.
- Os sons de “sh” e “zh”: prevention /pɹɪˈvɛnʃən/, transformation /ˌtɹæns.fɔɹˈmeɪ.ʃən/
- Palavras longas — acerte a sílaba tônica: biology /baɪˈɑ.lə.d͡ʒi/, transformation /ˌtɹæns.fɔɹˈmeɪ.ʃən/, malaria /məˈlɛəɹi.ə/, caterpillar /ˈkætɚˌpɪlɚ/, metamorphosis /ˌmɛtəˈmɔːfəsɪs/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
- Grave a sua voz e compare com o original, prestando atenção a palavras como mosquito, bite, egg.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.