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

氯和不立即杀死细；多数细几分钟内被杀死，但有些存活几天。

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

纽曼说，氯和含量的降低很大程度上是因为《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、基本上是元周期表的一个方向。

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

100 多种已知元中，只有两种室温下呈液态——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，如，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.

卤化银由银原子卤原子组成，卤原子包括像、氯、碘等元。

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， 因为银还和碘生成不溶性化合物，而和碘氯元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氯、或碘（卤元组的成员）结合一起就是半导体。

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%，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化银晶体时，从带负电的离子上“敲掉”一个电子，生成一个原子。

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， 铀经历许多不同类型的核衰变，因此每个铀原子不仅产生氪和的同位， 而且该过程还产生其他元的许多其他同位。