Fhsa
联邦危险物品法案（federal hazardous substances act）
🗣️ 情景例句
to keep working on my fashion designs.
继续我的服装设计工作。
What time does the first train to Boston leave?
第一班去波士顿的列车什么时间开出呢？
Excuse me, I must go.
请原谅，我得走啦。