很明显，她想谈些私事。It was clear that she wanted to discuss some private matter.他老是为私事来麻烦我.He always troubles me about his private affairs.她总是打听别人的私事.She is always prying into other people's affairs....
甲烷和丙烷是烷烃。Methane and propane are alkanes.丙烷气钢瓶a propane gas cylinder亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process....