In fact, the so-called self locking type gas spring or Angle or is a kind of air spring can be locked in any position of the stroke.

其实所谓的自锁型气弹簧也好调角器也好，都是一种可以在行程任一位置锁定的气弹簧。

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Setting up the foundation of the stroke at the beginning of the progression means you won't need your hands to balance or leverage into this position.

建立泳姿的基础之初的进展意味着你不需要你的手或杠杆平衡你在水中的位置。

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One of the most important things to remember when swimming freestyle, or any other stroke for that matter, is head and body position. You want your body to float as level on the water as possible.

自由泳练习或者在练习其他的划水时非常重要的一点是头部和身体的位置，你应该让你的身体在水中呈现尽可能的水平漂移！

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