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

Much of the time, the fins are sliced off with a blade at sea and the bloody shark torso thrown back in the water to die.

大多数时候，人们在海上用刀把鱼鳍割下来，然后便将血淋淋的鲨鱼躯干扔入海里，任由它们死去。

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

Then we send the information back to the manufacturers so they can make the blade more efficient and lighter.

FORBES: Connect

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