Protactinium
n. 镤\\n[化] 镤Pa
🏥 医学释义
钋
🗣️ 情景例句
One scoop or two?
一杓还是两杓？
Where can I get my baggage?
我到哪里去拿我的行李呢？
the waters flow more quietly, and in the end, without any visible break,
河水流得平缓起来，最后连绵不断地