Its composite blades shattered when hit by hail or birds.

碳复合材料叶片受到冰雹或飞鸟撞击后会粉碎。

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A study, published in Nature Medicine, showed how a drug could be created which sticks to tumours, but is then only activated when hit by specific waves of light.

在《自然医学》杂志发表的一项研究，介绍如何利用特定波长的光线激活附着在肿瘤上药物。

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Scientists have long known that vitamin D is a vital nutrient that the skin produces when hit by sunlight. The amount varies, depending on where the person lives, skin pigment, age and other factors.

科学界的共识是,人的皮肤可以通过日晒产生维生素D.而产生的数量并不固定,这取决于人所在地,皮肤的状况,年龄以及其他的因素.

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Professor Pace has a warning for people who let water hit their face when they first turn on the shower.

VOA: special.2009.10.13

And, when zinc sulfide is hit by particles or by anything, by radiation or by particles of greater than a certain critical energy, there is a glow.

当粒子或其他东西,通过辐射或粒子的方式，并且能量高于临界值,撞击到硫化锌的表面上的时候，就会发光。

麻省理工公开课 - 固态化学导论课程节选

So in a moment you're going to go ahead and hit the spacebar and then as things fall from the screen when they line up with the left arrow, hit the left arrow with a different arrow, hit that arrow and see how good a score you can get.

一会儿你走到前面，敲一下空格键,当屏幕上面的东西从左边往下掉的时候,你就敲一下键盘上的左键,是哪个方向，敲对应的方向键就可以了,我们来看看你能得多少分。

哈佛公开课 - 计算机科学课程节选

Outfielder Curtis Granderson broke his right forearm when hit by a pitch from Toronto's J.

WSJ: Yankees' Jeter disappointed by injury setback

Tsien's version of the protein produces all of its light when hit by a single color.

FORBES: Research

The Socialists called on other parties to also come clean when hit by scandals.

CNN: STORY HIGHLIGHTS