On the third length, breathe every three strokes, with each hand-hit counting as one stroke. This is commonly called bilateral breathing.
第三个长度采用三划一换气，注意每只手的划水都算一划。这样的换气方式就是通常说的双侧呼吸。
I've often seen swimmers who have been working on their Stroke Length, swimming with an impressively low SPL – let's say 12 strokes for 25 yards – but a thoroughly inefficient style.
我经常看到泳者练习他们的划手滑行长度，有些是让人印象深刻的低划数游泳（譬如说划手12次游25码）但是非常没有效率的游泳技巧。
These data do not lend support to the use of thigh-length GCS in patients admitted to hospital with acute stroke.
这些数据并不支持长筒gcs对急性中风住院患者血栓发生有预防作用。
According to the lowest driving speed allowed by the routes and the stroke curve of add-substract speed of the trucks, we have determined the length of climbing roadway with the graphic method.
文中根据路线允许最低车速和载重车的加减速行程曲线，用图解法确定爬坡车道的长度。
Start with a length of each stroke with one arm held down to your side.
开始每个有距离的泳姿只用一只胳膊。
Start with a length of each stroke with one arm held down to your side.
开始每个有距离的泳姿只用一只胳膊。
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