仰泳的选手如何知道他们前进的方向呢？

How do the back crawl swimmers see where they are going?

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改善仰泳的出发可以很轻松地提高零点几秒的成绩。

Improving your backstroke start is an easy way to shave a few tenths off any backstroke event.

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仰泳的上风在于便于呼吸，缺点则是游泳者不能看到前方的情况。

The backstroke has the advantage of easy breathing, but the disadvantage of swimmers not being able to see where they are going.

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