seabed for below
海床以下
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In a statement to the BBC, Exxon Mobil said that before drilling offshore "it is standard industry practice to conduct extensive studies at and below the seabed" to check for hazards, using tools including remote sonar and a magnetometer.
BBC: Russia explores old nuclear waste dumps in Arctic
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