Pfoa
[医][=Perfluorooctanoic acid]全氟辛酸
🗣️ 情景例句
And she's shy with new people, just like he is.
她见了生人就害羞 ，与他一样。
I hope you're enjoying your stay here.
我希望你在这里过得愉快。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，