There's commercial shipping, there's navy sonar, oil and gas extraction, pile driving, underwater explosions.
商业航运、海军声呐、石油和天然气开采、打桩、水下爆炸都发生在那里。
Pile driving
原声例句
科学60秒 2018年12月合集
英语百科
Pile driver
（重定向自Pile driving）
A pile driver is a mechanical device used to drive piles (poles) into soil to provide foundation support for buildings or other structures. The term is also used in reference to members of the construction crew that work with pile-driving rigs.
One traditional type of pile driver includes a heavy weight placed between guides so that it is able to freely slide up and down in a single line. It is placed above a pile (pole). The weight is raised, which may involve the use of hydraulics, steam, diesel, or manual labour. When the weight reaches its highest point it is then released and smashes on to the pile in order to drive it into the ground.
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