Phosphine (PH3) is a kind of extremely toxic, highly active, reductive gas, produced by the reduction of P biogeochemistry cycle, and has been proved to be trace gas existing stably in the atmosphere.

• 摘要磷化氢(PH3)是一种剧毒、十分活泼的还原性气体，是磷生物地球化学循环的还原产物，已被证实是大气中稳定存在的痕量气体。