Nitromagnesite
鎂硝石
??? 情景例句
What's your major?
你主修什么專業(yè)？
If you can find another pair of tickets we'll have enough for a dozen people.
如果你能再找到兩張，我們就可以有十二個人去了。
Let's move that bag, or there may be an accident. said Li Lei.
“我們搬走那包米，要不會出交通事故的”，李壘說。