do the backstroke
She does the backstroke every morning.
她每天早上游仰泳。
反手一击；反手击；（敲钟时的）回拉；回摆拉绳；反手的一击或打击。；一种游泳姿势,类似爬泳但游泳者仰卧；仰泳:仰卧水面,双臂划水使身体后退的游泳姿势。
a swimming stroke performed on one's back, with alternating arm movements and a flutter kick, like an upside-down crawl
反手的一击或打击。
A backhanded stroke or blow.
一种游泳姿势,类似爬泳但游泳者仰卧
a swimming stroke that resembles the crawl except the swimmer lies on his or her back
仰泳:仰卧水面,双臂划水使身体后退的游泳姿势。
A stroke swum lying on one's back, while rotating both arms through the water as to propel the swimmer backwards.
拉动钟绳尾部使钟绕一整圈的拉力。
The pull on the tail of the rope that swings the bell through a full circle.
She is very good at backstroke.
她非常擅长仰泳。
用法提示：此处backstroke为不可数名词，表示仰泳泳姿。
He swam a perfect backstroke in the competition.
他在比赛中游了一个完美的仰泳。
用法提示：此处backstroke为可数名词，指一次仰泳动作或一段仰泳。
The backstroke requires strong shoulder muscles.
仰泳需要强壮的肩部肌肉。
用法提示：此处backstroke为单数名词，指仰泳这项运动。
She does the backstroke every morning.
她每天早上游仰泳。
He swam the backstroke in the race.
他在比赛中游了仰泳。
backstroke用作定语修饰比赛。
She won the backstroke event.
她赢得了仰泳比赛。
grammar · medium
易错句子He backstroke well.
正确表达He backstrokes well.
动词第三人称单数一般现在时需加-s，此处主语为he，应使用backstrokes。
grammar · medium
易错句子He is good in backstroke.
正确表达He is good at backstroke.
表示擅长某项运动时，介词应使用at而非in，符合英语搭配习惯。
仰泳 vs 蛙泳：两者都是游泳姿势，但仰泳是背部朝上，蛙泳是胸部朝下。
仰泳 vs 反手击球：backstroke 是一种游泳姿势，而 backhand 是网球等运动中的击球方式。
noun
noun
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