Chlorine and bromine don't kill germs instantly; most are killed within minutes but some can take days.

氯和溴不能立即杀死细菌；多数细菌能在几分钟内被杀死，但有些能存活几天。

Newman said the reductions in chlorine and bromine levels came largely because of the limits set in the Montreal Protocol.

纽曼说，氯和溴含量的降低在很大程度上是因为《蒙特利尔议定书》规定的限制。

Oxygen, nitrogen, fluorine, chlorine, and bromine are basically the One Direction of the periodic table.

氧、氮、氟、氯、溴基本上是元素周期表的一个方向。

Only 2 of the 100-something known elements are liquid at room temperature -- bromine and mercury.

在 100 多种已知元素中，只有两种在室温下呈液态——溴和汞。

If a halogen, such as bromine, is added in the place of hydrogen, the reaction is called halogenation.

如果加入卤素，如溴，代替氢，则该反应称为卤化。

Silver halides are just some atoms of silver bound to atoms of any element known as a halogen, which includes things like bromine, chlorine, and iodine.

卤化银由银原子与卤素原子组成，卤素原子包括像溴、氯、碘等元素。

This makes sense because silver also makes insoluble compounds with bromine and iodine, which are in the same column of the periodic table as chlorine.

这是有道理的， 因为银还会与溴和碘生成不溶性化合物，而溴和碘与氯在元素周期表中位于同一列。

Much of the interest in perovskites comes because those which combine metal atoms with chlorine, bromine or iodine (members of a group of elements called halogens) are semiconductors.

人们对钙钛矿的兴趣很大，因为那些将金属原子与氯、溴或碘（卤素元素组的成员）结合在一起就是半导体。

Chlorine levels are down 11.5% since they peaked in 1993, and bromine is at lower levels in the air, dropping 14.5 percent since its 1999 peak, the report said.

报告表示，其中氯的大气含量相比 1993 年的峰值下降了 11.5%，溴在大气中的水平比较低，含量较 1999 年的峰值下降了 14.5%。

When a photon hits a crystal of silver bromide on a film strip, for instance, it knocks an electron off a negatively-charged bromide ion to create an atom of bromine.

例如，光子撞击胶卷表面的溴化银晶体时，从带负电的溴离子上“敲掉”一个电子，生成一个溴原子。

Like we saw last week, uranium undergoes many different types of nuclear decay, so not only does each uranium atom produce isotopes of krypton and bromine, but that process also produces many other isotopes of other elements.

就像我们上周看到的那样， 铀会经历许多不同类型的核衰变，因此每个铀原子不仅会产生氪和溴的同位素， 而且该过程还会产生其他元素的许多其他同位素。