drill双语例句

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解答：

1 . A plug had been inserted in the drill hole.

钻孔已塞上了塞子。

2 . The drill should be slowly rotated to ensure a clean hole.

钻头必须缓慢转动，以保证钻孔平整光滑。

3 . It took five years to drill down to bedrock.

耗时五年才钻到了基岩。

4 . The dentist commenced to dig, drill and finally fill the offending tooth.

牙医开始在那颗有问题的牙齿上挖洞，钻孔，直到最后把它补好。

5 . His hands were clasped behind him like a drill sergeant.

他双手背在身后，像一个教官。

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