Dena
[医][=diethylnitrosamine]二乙基亚硝胺
🗣️ 情景例句
who used to run the drugstore in town.
他过去在镇上经营药房。
A little of everything, nothing at all.
每事浅尝辄止，结果将一事无成。
It did not;
其实没有。