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汉语拼音：lǔ sù

指卤族元素。元素周期表中VIIA族元素的总称。包括氟、氯、溴、碘、砹五种元素。砹是放射性元素。卤素是典型的非金属元素。

1. 氟、氯、溴、碘、砹五种元素的化学性质很相似，组成一族叫做卤素。能直接和金属化合成盐类，是最强的氧化剂之一，也是重要的化学原料，可以用来制药物、染料、塑料、合成橡胶等。也叫卤或卤族。

• Can't you give me a break on this? We've already spent so much money on lighting, I hate to have to blow so much more on halogens.

  你不能给我算便宜点吗？我们已经在照明上花了很多钱了，我不想在卤素灯上在浪费那么多钱。

• In the post-stage of mineralization, they may form a halogen halo in the wall rocks in the upper part of the orebody.

  在成矿过程中尤其在成矿的后期，它们能在矿体上部形成范围较广的卤素扩散晕。

• A siphon pot has two stacked glass globes . First, water is placed in the bottom globe and heated with a halogen lamp.

  一个虹吸壶有两个上下堆放的玻璃球容器，首先，水倒入下玻璃球容器，用卤素灯加热。

• To with-stand the heat generated at the same time, the tube is made of quartz and filled with halogen (bromide or iodine) and inert gases.

  为了抵受同时产生的热力，灯管用石英造成内置卤素（溴或碘）和惰性气体。

• Electronic components. Halogen free materials for sheath used in communication cables with particular fire related properties.

  电子件.耐火通讯电缆护套用无卤素的材料

• The lamp must be placed at least 20 cm from other objects as halogen bulbs get very hot.

  由于卤素灯泡会变得很热，所以，必须将灯具置于距离其他物体至少20厘米的地方。

• When substitution (or transfer) of a halogen occurs onto a nitrogen atom, a relatively reactive N-halo organic compound results.

  当代替（或调动）时卤素发生氮气原子，一个相对地易反应的N光晕有机化合物发生。

• The invention provides a halogen-containing asymmetry phthalocyanines compound and a preparation method thereof.

  本发明提供了一类含卤素不对称菁类化合物及其制备方法。

• It provides orientable halogen task lighting, and its elegant counterweight and arm system keep the head constantly parallel to the table.

  它提供了定向卤素工作照明，其优雅的姿势和手臂系统保持头部不断平行。