Paraphenylenediamine
[医]对苯二胺：一种染料，分子式为C6H4(NH2)2，其盐酸盐可将头发染黑，但可引起迟发性接触性过敏反应
🗣️ 情景例句
I can't believe it!
我简直不敢相信！
Good news goes on crutches.
好事不出门。
I immediately embarked on an experiment which, even though if failed to get rid of the ants, kept me fascinated for twenty-four hours.
我当即动手作了一项试验，这项试验尽管没有使我摆脱这些蚂蚁，却使我着迷了24小时。