动词短语
中文翻译：钻探
同义词：
['sub-drilling', 'sub-borehole drilling']
例句：
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1. During the initial drilling phase, we used a small drill to test the rock formation.
在初步钻探阶段，我们用一个小钻头来测试岩石构造。
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2. The engineers decided to subdrill the area where the pipes were damaged.
工程师们决定对管道损坏的区域进行进一步钻探。
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3. The subdrilling process is crucial for ensuring the integrity of the wellbore.
钻探过程对于确保井眼完整性至关重要。