Fifra
[医][=Federal Insecticide,Fungicide and Rodenticide Act of 1972]1972年联邦杀虫剂、杀真菌剂和灭鼠剂条例
🗣️ 情景例句
Maybe she'll call back. She promised.
也许她会打电话回来。她说了。
You are still thinking about a Ph.D., aren't you?
你还是想学成博士，是吗？
It is used by travellers and business people all over the world.
在世界各地的旅行者及商人都用英语。