根据中铝的录像和安全部门的照片，一位妇女向警察举起了一桶水，在她后面的人扔起了石块。

A woman heaved a pail of water at policemen and people behind her threw rocks, according to a Chinalco video and security photos.

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生产出来泡沫铝的密度决定了该产品的强度。

The density of the bubbles determines the strength of the products produced.

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他知道他不能将砷放到，他不能把砷放到铝的下面。

He knows that he shouldn't put arsenic under - he shouldn't put arsenic under aluminum.

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He says not only does arsenic belong under phosphorus, I predict that there is an element that lies below aluminum and above indium.

他认为不仅砷属于在磷下面，我预言还有一个元素,是在铝之上和铟的下边的。

麻省理工公开课 - 固态化学导论课程节选

He knows that he shouldn't put arsenic under - He shouldn't put arsenic under aluminum.

他知道他不能将砷放到,他不能把砷放到铝的下面。

麻省理工公开课 - 固态化学导论课程节选

The reason it's aluminum is because aluminum has a lower z effective, so it's not being pulled in as tightly by the nucleus, and if it's not being pulled in as tightly, you're going to have to put in less energy in order to ionize it, so that's why it's actually going to have the smaller ionization energy.

原因是,铝的有效核电量更少，所以没有被原子核束缚得更紧，而如果没有被束缚得更紧，你为了电离它所需要注入的能量也就更少，这就是,它的电离能会更低的原因。

麻省理工公开课 - 化学原理课程节选