跟读练习: Unit 8: BUBBLES IN BOILING WATER - 通过视频学习英语口语

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Unit 8.
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Bubbles in Boiling Water Where do the bubbles come from when you boil water?
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Water is a liquid.
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When it is heated, it moves around faster and faster.
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When it starts to boil, the liquid turns into a gas.
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This gas is called water vapor.
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This gas is lighter than the water around it.
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It rises to the top.
9
Then it disappears into the air.
10
As the water gets hotter and hotter, it starts turning into gas very quickly.
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A lot of bubbles form at the same time.
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All these bubbles try to escape at once.
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The bubbles push the water out of the way and jump out.
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This is what we call boiling water.
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More and more water turns into gas.
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More of it disappears into the air.
17
After a while, every drop of the water will be gone.
18
Try it and see.
19
Where do the bubbles come from when you boil water?
20
Water is a liquid.
21
When it is heated, it moves around faster and faster.
22
When it starts to boil, the liquid turns into a gas.
23
This gas is called water vapor.
24
This gas is lighter than the water around it.
25
It rises to the top.
26
Then it disappears into the air.
27
As the water gets hotter and hotter, it starts turning into gas very quickly.
28
A lot of bubbles form at the same time.
29
All these bubbles try to escape at once.
30
The bubbles push the water out of the way and jump out.
31
This is what we call boiling water.
32
More and more water turns into gas.
33
More of it disappears into the air.
34
After a while, every drop of the water will be gone.
35
Try it and see!
36
Where do the bubbles come from when you boil water?
37
Water is a liquid.
38
When it is heated, it moves around faster and faster.
39
When it starts to boil, the liquid turns into a gas.
40
This gas is called water vapor.
41
This gas is lighter than the water around it.
42
It rises to the top.
43
Then it disappears into the air.
44
As the water gets hotter and hotter, it starts turning into gas very quickly.
45
A lot of bubbles form at the same time.
46
All these bubbles try to escape at once.
47
The bubbles push the water out of the way and jump out.
48
This is what we call boiling water.
49
More and more water turns into gas.
50
More of it disappears into the air.
51
After a while, every drop of the water will be gone.
52
Try it and see.
53
Where do the bubbles come from when you boil water?
54
Water is a liquid.
55
When it is heated, it moves around faster and faster.
56
When it starts to boil, the liquid turns into a gas.
57
This gas is called water vapor.
58
This gas is lighter than the water around it.
59
It rises to the top.
60
Then it disappears into the air.
61
As the water gets hotter and hotter, it starts turning into gas very quickly.
62
A lot of bubbles form at the same time.
63
All these bubbles try to escape at once.
64
The bubbles push the water out of the way and jump out.
65
This is what we call boiling water.
66
More and more water turns into gas.
67
More of it disappears into the air.
68
After a while, every drop of the water will be gone.
69
Try it and see.
70
Where do the bubbles come from when you boil water?
71
Water is a liquid.
72
When it is heated, it moves around faster and faster.
73
When it starts to boil, the liquid turns into a gas.
74
This gas is called water vapor.
75
This gas is lighter than the water around it.
76
It rises to the top.
77
Then it disappears into the air.
78
As the water gets hotter and hotter, it starts turning into gas very quickly.
79
A lot of bubbles form at the same time.
80
All these bubbles try to escape at once.
81
The bubbles push the water out of the way and jump out.
82
This is what we call boiling water.
83
More and more water turns into gas.
84
More of it disappears into the air.
85
After a while, every drop of the water will be gone.
86
Try it and see.
87
Where do the bubbles come from when you boil water?
88
Water is a liquid.
89
When it is heated, it moves around faster and faster.
90
When it starts to boil, the liquid turns into a gas.
91
This gas is called water vapor.
92
This gas is lighter than the water around it.
93
It rises to the top.
94
Then it disappears into the air.
95
As the water gets hotter and hotter, it starts turning into gas very quickly.
96
A lot of bubbles form at the same time.
97
All these bubbles try to escape at once.
98
The bubbles push the water out of the way and jump out.
99
This is what we call boiling water.
100
More and more water turns into gas.
101
More of it disappears into the air.
102
After a while, every drop of the water will be gone.
103
Try it and see.
104
Where do the bubbles come from when you boil water?
105
Water is a liquid.
106
When it is heated, it moves around faster and faster.
107
When it starts to boil, the liquid turns into a gas.
108
This gas is called water vapor.
109
This gas is lighter than the water around it.
110
It rises to the top.
111
Then it disappears into the air.
112
As the water gets hotter and hotter, it starts turning into gas very quickly.
113
A lot of bubbles form at the same time.
114
All these bubbles try to escape at once.
115
The bubbles push the water out of the way and jump out.
116
This is what we call boiling water.
117
More and more water turns into gas.
118
More of it disappears into the air.
119
After a while, every drop of the water will be gone.
120
Try it and see!
121
Where do the bubbles come from when you boil water?
122
Water is a liquid.
123
When it is heated, it moves around faster and faster.
124
When it starts to boil, the liquid turns into a gas.
125
This gas is called water vapor.
126
This gas is lighter than the water around it.
127
It rises to the top.
128
Then it disappears into the air.
129
As the water gets hotter and hotter, it starts turning into gas very quickly.
130
A lot of bubbles form at the same time.
131
All these bubbles try to escape at once.
132
The bubbles push the water out of the way and jump out.
133
This is what we call boiling water.
134
More and more water turns into gas.
135
More of it disappears into the air.
136
After a while, every drop of the water will be gone.
137
Try it and see.
138
Where do the bubbles come from when you boil water?
139
Water is a liquid.
140
When it is heated, it moves around faster and faster.
141
When it starts to boil, the liquid turns into a gas.
142
This gas is called water vapor.
143
This gas is lighter than the water around it.
144
It rises to the top.
145
Then it disappears into the air.
146
As the water gets hotter and hotter, it starts turning into gas very quickly.
147
A lot of bubbles form at the same time.
148
All these bubbles try to escape at once.
149
The bubbles push the water out of the way and jump out.
150
This is what we call boiling water.
151
More and more water turns into gas.
152
More of it disappears into the air.
153
After a while, every drop of the water will be gone.
154
Try it and see!
155
Where do the bubbles come from when you boil water?
156
Water is a liquid.
157
When it is heated, it moves around faster and faster.
158
When it starts to boil, the liquid turns into a gas.
159
This gas is called water vapor.
160
This gas is lighter than the water around it.
161
It rises to the top.
162
Then it disappears into the air.
163
As the water gets hotter and hotter, it starts turning into gas very quickly.
164
A lot of bubbles form at the same time.
165
All these bubbles try to escape at once.
166
The bubbles push the water out of the way and jump out.
167
This is what we call boiling water.
168
More and more water turns into gas.
169
More of it disappears into the air.
170
After a while, every drop of the water will be gone.
171
Try it and see!

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