他继续拽那细绳，扁平的软木浮圈越来越近，终于，渔网升出了水面。
He tugged at the thin ropes, and nearer and nearer came the circle of flat corks, and the net rose at last to the top of the water.
救生圈，救生衣：一种有浮力的装置，如软木或聚苯乙烯圈，用来使人能浮在水中。
A buoyant device, such as a cork or polystyrene ring, for keeping a person afloat in water.
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