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More backspin will slow the ball down and let it drop

更多的回旋会减球速，使它掉进场内。

More backspin will slow the ball down and let it dropinto the court.

更多的回旋会减球速，使它掉进场内。

A spin given to a ball opposite to its direction of flight; a backspin .

旋球与球飞进方向相反的旋转；逆旋转

A tennis return made with a downward motion that puts backspin on the ball.

在网球中用一个向下的动作来使球旋转回去。

If you want to have an advanced push, you need to push quick off the bounce. You can take the ball late as a variation, or if you are trying to really load up on the backspin.

如果你想搓出高级球，你需要在球刚弹起时就搓（也可以晚搓作为变化，或者你想加很大的下旋）。

The backspin as we discussed before generates the lift by deforming the airflow around the ball.

下旋，我们讨论过的升降机的产生变形的球周围的气流。

Backspin - A reverse spin placed on the ball to make it stop short on the putting surface.

下旋——以反旋转的方式开球，使其在推杆果岭上急停。

Given to a ball opposite to its direction of flight; a backspin.

旋'。''球与球飞进方向相反的旋转；逆旋转

But to hit the ball with good quality, you have to have a good backswing.

但是要想打出高质量的击球，你一定要有好的后摆。

Ball approaches you. In particular, you should not start a backswing until

你没有准备好击穿球之前不应该开始引拍，几乎应该是一个连续的动作。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。