A prone floating position in swimming in which the swimmer's arms are extended straight forward above the head and the legs are held together.
一种俯卧状漂浮游泳的姿势，游泳者的胳膊向前直伸超过头部，而且腿合在一起。
Swimming, cycling, elliptical training, and rowing will burn a lot of calories and improve your aerobic fitness, but be careful not to aggravate injury-prone areas (see below).
游泳，骑车，踩踏机，和划船可以消耗大量卡路里并提高你的有氧功能，但是主要不要过度使用容易受伤的区域（见下）。
The electrical safety code about hazardous special locations as bathrooms, swimming pools, prinking pools etc, which are all accident-prone, is not perfect.
在安全性能方面，对像浴室、游泳池、喷泉等发生电气事故的危险性较大的特殊场所，我国制定的电气安全法规尚有不完善之处。
The electrical safety code about hazardous special locations as bathrooms, swimming pools, prinking pools etc, which are all accident-prone, is not perfect.
在安全性能方面，对像浴室、游泳池、喷泉等发生电气事故的危险性较大的特殊场所，我国制定的电气安全法规尚有不完善之处。
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