Perthiocarbonate
过硫碳酸盐
🗣️ 情景例句
There are many natural catastroophes occurring in nature.
自然界里有很多自然灾害发生。
Did you tell him yourself?
你自己亲自告诉他吗？
These are partly a matter of personal circumstances, partly a matter of psychology.
这里一方面是个人所处的环境，另一方面是个心理学的问题。