This is a natural motion and produces topspin on their shots.

Assuming your driving the ball or hitting with topspin.

假定你用力击球或以上旋球打击.

Topspin spin is when the ball is spinning over itself in the direction moving forward.

许多网球选手对于落地回击上旋球有误会.我将试着简略地阐明一下.

He turned the little boy topsy-turning.

他把这个小男孩倒提着.

Topsy would hold a perfect carnival of confusion , for some one or two hours.

托普西就会恣意胡闹上一、二个小时.

Their scrapping the contract is turning all our arrangements for the performance topsy-turning.

他们毁约,打乱了我们所有的演出安排.

The children turned the whole house topsy-turvy when their mother went out.

当母亲不在家时,孩子们把屋里都翻遍了.

He left his room all topsy-turvy.

他把他的房间弄得乱七八糟.

Don't turn the box topsy-turvy, the dish might fall out.

不要把箱子倒过来, 盘子会掉出来.

The refusal of the actor turned all our arrangements for the performance topsy-turvy.

那个演员拒绝出台把我们整个演出安排都搞乱了.

But that's only half the battle -- particularly in a year when finances are topsy-turvy.

但这仅是半场“战役 ” - 尤其在这个经济不景气的年头.

When anything is topsy-turvy, it turns my stomach.

如果一切都乱七八糟, 就会使我倒胃口.

The whole world's going topsy-turvy.

整个世界正变得颠三倒四.

If you turn the envelope topsy-turvy, the key will fall out.

如果你把信封倒过来, 钥匙就会掉出来.

The market prices are topsy-turvy in relation to factory prices.

市场价与出厂价倒挂.

…the moss-covered, topsy-turvy gravestones.

长满苔藓、东倒西歪的墓碑

The world has turned topsy-turvy in my lifetime.

在我的一生中世界已经变得一团糟。

Everything's topsy-turvy in my life at the moment.

现在我的生活全都被打乱了。

Everything has turned topsyturvy.

事事都变得乱七八糟的.

It can measure the revolution , toque, power and oil consumption of the engine.

可测出发动机转速, 扭矩, 功率,油耗.

Besides , constant current and choppingand triangle-wave driving method were adopted to improve the toque performance.

采用恒流技术结合三角波形的高性能驱动方式,改善了电机的运行性能,并实际证实了该控制技术的可行性.