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身體位置

151.身體中線：center[medium」line of the body

152.軀干位置：trunk position

153.身體平衡：body balance

154.浮力：buoyancy

155.浮出水面：surface

156.浮在水面：keep afloat

157.浸入水中：submerge

158.下沉：drop; sink

159.水面線（蛙泳中頭的位置）：waterline

160.俯臥姿勢：face down; prone position

161.仰臥姿勢：back floating position

162.俯臥漂游姿勢：prone float

163.流線型姿勢：streamlined position

164.低頭：drop the head

165.弓背[身] ：arch the back

166.時起時伏（在水中）：ducking; undulation

167.滑行：glide