C5
[醫(yī)] 溴化五烴季胺, 溴化次戊基三甲季銨
??? 情景例句
My visa is multi-entry; it allows me to exit the country and then re-enter, as ofter as I like.
我的簽證是往返簽證，我可以隨便進(jìn)出這個(gè)國(guó)家。
What's goes on here?
什么事？
Competition between ourselves, person against person, community against community,
然而人類之間的競(jìng)爭(zhēng)，人與人，團(tuán)體與團(tuán)體，