71. | The water turned into ice . |
| 水结成了冰。
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72. | Water turns to ice at 0℃. |
| 水在零摄氏度时变成冰。
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73. | Frost hardened the water of the puddles into ice . |
| 严寒使水坑里的水结成了冰。
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74. | He ventured out on the thin ice and fell through. |
| 他冒险走上薄冰,结果穿过冰层掉了下去。
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75. | When you are walking on thin ice , be careful not to fall through. |
| 在薄冰上行走时,你档心不要踩破冰跌下去。
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76. | The boy fell through the ice and was drowned. |
| 那个男孩掉进冰窟窿淹死了。
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77. | Ice is water in solid form. |
| 冰是固体水。
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78. | Ice , snow and steam are forms of water. |
| 冰、雪和蒸汽是水的不同形态。
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79. | The ice forms early and stays late in the north. |
| 北方冰结得早,融化得迟。
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80. | The stream has frozen up; you can see the fish trapped in the ice . |
| 小河冰冻起来了,你可以看见冻在冰里的鱼。
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