释义
n.
a weight used to sink a fishing line or sounding line
（钓丝的）铅锤；测深锤。
(亦作
【棒球】 下坠球。
a type of windsurfing board of insufficient buoyancy to support its crew unless moving fast
（如不快速移动则浮力不够的）冲浪板。
〈美〉 炸面圈。