Footeite
銅氯礬
??? 情景例句
Notices are displayed on the bus asking people not to smoke.
公共汽車上張貼著請勿吸煙的公告。
When did you find this book?
你什么時候找到這本書的？
it naturally limits all those engaged in carrying it out from effective contact
那些從事科研的人員自然受到了限制。他們不能進行有效的接觸