a person who gains (gains an advantage or gains profits)
a dive in which the diver throws the feet forward to complete a full backward somersault and enters the water feet first and facing away from the diving board
同义词：full gainer
gainer详细解释
gain.er n.（名词）One that gains:获得者：例句：a gainer of weight.一个体重增加者 Sports A dive in which the diver leaves the board facing forward, does a back somersault, and enters the water feet first.【体育运动】 后滚翻花式跳水：跳水运动员面向前跳离跳板，向后翻腾一周后入水，身体直立脚先触水
