drilling substances
钻井的物质
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Bioerosion: process by which animals, through drilling, grazing and burrowing, erode hard substances, for example rocks and coral reefs.
UNESCO: L O S S A R Y
There was in fact a discharge from a drilling rig in March, but the oil people say it consisted of mud containing no substances that would affect the environment.
ECONOMIST: Oil and the seals of Kazakhstan
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