the back stroke的意思|示意

When they get the hang of this, have them repeat the drill over and over again, making sure they get back to streamline for a few counts prior to taking the next stroke.

当他们熟悉的，要有他们再说一遍一遍又一遍的游泳练习，让他们回到流线型的前几计数以下一动作。

The start in back stroke and medley relay races shall be from the water.

仰泳和混和接力泳的出发是在水中。

Prepare to correctly breath in during the arm stroke, by having his chin nearly touching the shoulder of the arm that is completeing the push back phase.

在划水的过程中就做好正确呼吸的准备，他让下巴几乎接触到已完成划水后推动作的那只手臂的肩膀。

The utility model relates to a rotary oil cylinder stroke control device which comprises an adjusting nut (3) arranged at the back end of an oil cylinder stroke shaft (2).

本实用新型涉及一种回转油缸行程调节装置，在油缸行程轴(2)的后端装有一个调节螺母(3)。

Yes. In medley relays, each swimmer swims one stroke for the set distance; the order is back-stroke, breast-stroke, butterfly and freestyle.

是的，在混合泳接力赛中，每位运动员以一种姿势游一定距离，顺序依次是斧正游泳、蛙泳、蝶泳和自由泳。

If I do the back-stroke, I usually find myself bumping into other people in the pool, because I can't see where I'm going.

假如我游仰泳，我常会在游泳池中撞到其他人，因为我无法知道我身在何处；