But when flying forward the air passing over the blade that is advancing to the front of the helicopter (and so into oncoming air) provides more lift than the one that is retreating to the back.

但是当向前飞行时，它的旋翼将转向直升飞机的前方(如此一来，就变成朝向迎面而来的空气)，经过叶片上方的气流将比经过叶片背面的气流产生更大的升力。

youdao

It cut deep: the edge of the blade reached to the back of his throat.

这一砍砍得极深，锋刃已经触及到喉部后侧。

youdao

And I stopped the blade, slicing the air as I pushed him away, letting him fall back to the street.

我停下手里的刀，在空中挥了几下又把他推开。

youdao

If a surgeon used a scalpel enhanced with Smart-Tool technology, the real-time sensor on the blade could sense what kind of tissue it is touching and rely the information back to the doctor.

BBC: Promise of touch technologies