跟讀練習: Fertilization - 通過影片學習英語口語
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46 句
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Fertilization is the epic story of a single sperm facing incredible odds to unite with an egg
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and form a new human life.
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It is the story of all of us.
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During sexual intercourse, about 300 million sperm enter the vagina.
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Soon afterward, millions of them will either flow out of the vagina or die in its acidic environment.
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However, many survive because of the protective elements provided in the fluid surrounding them.
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Next, the sperm must pass through the cervix, an opening into the uterus.
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Usually, it remains tightly closed, but here the cervix is open for a few days while the woman ovulates.
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The sperm swim through the cervical mucus, which is thinned to a more watery consistency for easier passage.
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Once inside the cervix, the sperm continue swimming toward the uterus, though millions will die trying to make it through the mucus.
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Some sperm remain behind, caught in the folds of the cervix, but they may later continue the journey as a backup to the first group.
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Inside the uterus, muscular uterine contractions assist the sperm on their journey toward the egg.
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However, resident cells from the woman's immune system, mistaking the sperm for foreign invaders, destroy thousands more.
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Next, half the sperm head for the empty fallopian tube, while the other half swim toward the the tube containing the unfertilized egg.
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Now, only a few thousand remain.
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Inside the fallopian tube, tiny cilia push the egg toward the uterus.
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To continue, the sperm must surge against this motion to reach the egg.
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Some sperm get trapped in the cilia and die.
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During this part of the journey, chemicals in the reproductive tract cause the membranes covering the heads of the sperm to change.
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As a result, the sperm become hyperactive, swimming harder and faster toward their destination.
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At long last, the sperm reach the egg.
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Only a few dozen of the original 300 million sperm remain.
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The egg is covered with a layer of cells called the corona radiata.
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The sperm must push through this layer to reach the outer layer of the egg, the zona pellucida.
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When sperm reach the zona pellucida, they attach to specialized sperm receptors on the surface,
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which triggers their acrosomes to release digestive enzymes,
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enabling the sperm to burrow into the layer.
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Inside the zona pellucida is a narrow fluid-filled space just outside the egg cell membrane.
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The first sperm to make contact will fertilize the egg.
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After a perilous journey and against incredible odds, a single sperm attaches to the egg cell membrane.
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Within a few minutes, their outer membranes fuse and the egg pulls the sperm inside.
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This event causes changes in the egg membrane that prevent other sperm from attaching to it.
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Next, the egg releases chemicals that push other sperm away from the egg and create an impenetrable fertilization membrane.
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As the reaction spreads outward, the zona pellucida hardens, trapping any sperm unlucky enough to be caught inside.
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Outside the egg, sperm are no longer able to attach to the zona pellucida.
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Meanwhile, inside the egg, the tightly packed male genetic material spreads out.
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A new membrane forms around the genetic material, creating the male pronucleus.
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Inside, the genetic material reforms into 23 chromosomes.
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The female genetic material, awakened by the fusion of the sperm with the egg, finishes dividing, resulting in the female pronucleus,
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which also contains 23 chromosomes.
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As the male and female pronuclei form, spiderweb-like threads, called microtubules, pull them toward each other.
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The two sets of chromosomes join together, completing the process of fertilization.
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At this moment, a unique genetic code arises, instantly determining gender, hair color, eye color, and hundreds of other characteristics.
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This new single cell, the zygote, is the beginning of a new human being.
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And now the cilia and the fallopian tube gently sweep the zygote toward the uterus, where he or she will implant in the rich uterine lining,
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growing and maturing for the next nine months until ready for birth.
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本課的詞彙與口語要點
這節 C1 級別的口語課以影片“Fertilization”為素材。 影片中反覆出現的詞有：sperm, egg, inside, membrane, toward。 這段影片共有 46 個句子、662 個單詞可供跟讀。 講話部分時長為 5:23。 說話人語速平穩，每分鐘約 123 個詞，很適合跟讀。 只有 67% 的單詞屬於英語最常用的 3,000 詞，詞彙難度較高。
影片中的重點詞彙
影片中最難的 15 個單詞，附發音和釋義：
| 單詞 | 發音 | 釋義 |
|---|---|---|
| membrane 名詞 | /ˈmɛm.bɹeɪn/ | 薄膜 |
| cervix 名詞 | /ˈsɝ.vɪks/ | 子宮頸 /子宮頸 |
| attach 動詞 | /əˈtæt͡ʃ/ | 附上, 附 |
| chromosome 名詞 | /ˈkɹoʊməˌsoʊm/ | 染色體 /染色體 |
| cilium 名詞 | /ˈsɪl.i.əm/ | 纖毛 /纖毛, 纖毛 |
| mucus 名詞 | /ˈmjuːkəs/ | 黏液 |
| uterine 形容詞 | /ˈjutəɹaɪn/ | 子宮 /子宮 |
| zygote 名詞 | /ˈzaɪˌɡoʊt/ | 合子, 受精卵 |
| vagina 名詞 | /vəˈdʒaɪ.nə/ | 陰道 /陰道 |
| acrosome 名詞 | 頂體 /頂體 | |
| awaken 動詞 | /əˈweɪkən/ | 喚醒 /喚醒, 叫醒 |
| burrow 名詞 | /ˈbʌɹoʊ/ | 地洞 |
| contraction 名詞 | /kənˈtɹækʃ(ə)n/ | 收縮 /收縮 |
| impenetrable 形容詞 | /ɪmˈpɛnətɹəbəl/ | 不能通過的, 不能滲透的 |
| invader 名詞 | /ɪnˈveɪ.də(ɹ)/ | 侵略者, 侵入者 |
需要注意的發音
- “sh” 和 “zh” 音: contraction /kənˈtɹækʃ(ə)n/, specialize /ˈspɛʃəˌlaɪz/, fusion /ˈfjuː.ʒən/
- 長單詞——注意重音位置: hyperactive /ˌhaɪpəɹˈæk.tɪv/, impenetrable /ɪmˈpɛnətɹəbəl/, reproductive /ˌɹiːpɹəˈdʌktɪv/, characteristic /ˌkæɹ(ə)ktəˈɹɪstɪk/, consistency /kənˈsɪs.tən.si/
中文母語者容易讀錯的音：
- /v/ — 不要讀成 /w/，上齒輕觸下唇: cervix /ˈsɝ.vɪks/, vagina /vəˈdʒaɪ.nə/, digestive /daɪˈdʒɛstɪv/, hyperactive /ˌhaɪpəɹˈæk.tɪv/, invader /ɪnˈveɪ.də(ɹ)/
- 詞尾子音 — 要讀清楚，後面不要加母音: uterus /ˈjuː.tə.ɹəs/, cervix /ˈsɝ.vɪks/, attach /əˈtæt͡ʃ/, mucus /ˈmjuːkəs/, zygote /ˈzaɪˌɡoʊt/
- /r/ 和 /l/ 的區別: fertilize /ˈfɜː(ɹ)tɪlaɪz/, impenetrable /ɪmˈpɛnətɹəbəl/, perilous /ˈpɛɹ.ɪ.ləs/
如何用這段影片練習
- 先完整聽一遍影片，不要開口，記下不認識的單詞。
- 用正常速度逐句跟讀，每句重複到你的節奏與說話人一致為止。
- 錄下自己的聲音並與原聲對比，特別注意 membrane, cervix, attach 這類單詞。
什麼是跟讀法？
跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。