Rtecs
化学物质毒性影响的登记
🗣️ 情景例句
She is quite good with her hands.
她的手很巧。
What? Already? Won't you have more coffee?
怎么，已经要走了？要不要再喝点咖啡？
I agree that it is a difficult situation.
我同意，这种情况很难办。