特殊用途直管荧光灯中的汞含量。

Mercury in straight fluorescent lamps for special purposes.

youdao

小型日光灯中的汞含量不得超过5毫克/灯；

Mercury in compact fluorescent lamps not exceeding 5 mg per lamp.

youdao

大概你已经在户外的蜡烛和灯中见到过，目前的外用洗液，喷剂中也都含有。

You've probably seen it in outdoor candles and lanterns, and you can also find it in topical lotions and sprays.

youdao

When you go down the highway and you look up and see those sodium vapor lamps, the sodium vapor exists as the dimer Na2.

你在下高速公路时,会看到一些钠蒸汽灯，蒸汽灯中钠就有以Na2存在的。

麻省理工公开课 - 固态化学导论课程节选