The sailors began to lower a boat.
水手们开始降低船。
On the lower deck in a third, an oldish-looking, bare-bodied fellow is leaning over an oar, staring vacantly at our boat.
第三条船的下甲板上，一位年纪稍长的船夫正赤膊倚在一支桨上，茫然地瞪着我们的船。
A keel also provides weight low under the water to lower the boat's center of gravity below the waterline, which is needed so that the boat bobs back upright if knocked over by wind or waves.
龙骨同时也增加了船只的底部重量，从而将船只重心降到吃水线之下，而这对于船只在被风浪打翻时能够得以及时回正是十分必要的。
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