她是蕴藏万物神奇的海底世界。那是高耸的海山、起伏的海丘、绵延的海岭、深邃的海沟、坦荡的平原，密集的珊瑚礁上珊瑚虫摆动着触须。
She is the hidden magic of the underwater world of all things. It was tall seamount, undulating Haiqiu, long ridge, deep trenches, plains magnanimous, dense coral reefs swinging tentacles.
如果震中位于海底，板块运动带动上方海水起伏，形成波浪。
If the epicentre is on the seabed, that also lifts the water above the bed, creating a wave.
用滚筒式采矿头在起伏不定的微地形上切削海底富钴结壳时，需按开采要求确定其切削厚度。
When the Rotary cutting Drum for mining Cobalt-rich Crust is working on the fluctuant microtopography of sea floor, it's necessary to determine the cutting depth according to the mining requirement.
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