很高兴为您
ballast 是“压舱物”,一般船舶在江海航行,由于船身重量不足以抵挡大风大浪,所以一般都会在底舱装些重物来压仓.
In ballast the ships draw around 12 metres (39 ft) of water
这些船装了约12米（39英尺）深的米来压仓.
这句英文表述很有问题,装水/拉水竟然用“draw”,这是拉拔东西的"拉"而非拉水,并且应该用for ballast.
For ballast,the ships carry ard.12 metres (39ft) of water.
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