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| 11. | If the area is on high ground, the soil is soft enough for them to dig deep enough to avoid freezing, |
| 如果冬眠地区在高原，土壤足够松软，使龟可以向地下挖深以避免被冻僵，冬眠地同时可以保存一定的湿气，那一只健康的龟就能在室外冬眠。 |
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| 12. | If you dig deep enough, with luck, you will strike oil or gas, which are used as our main sources of |
| 如果你挖得够深，就可能挖到石油或者天然气。这些东西都是人类的主要燃料和能源。 |
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| 13. | Two brothers decided to dig a deep hole behind their house. |
| 有兄弟俩人决定在他们房子后面挖一个深洞。就在他们不停挖洞时，几个年龄大点的男孩在附近停下来观看。 |
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| 14. | "If you are going to build the Empire State Building, the first thing you need to do is dig a deep hole |
| 如果你要去建立帝国大厦,你要做的第一件事就是挖个深坑,打牢基 |
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