有时还可用在非正式谈话或是商务口语当中。比如你想提醒同事明天九点开会,你就可以说:FYI, meeting's at 9 tomorrow.  3、ASAP  as soon as possible  意思是尽快。常用在邮件里。  例句:  Please revise and resend to us ASAP, thanks!  请尽快修改后重新发给我们,谢谢!  4、BYOB  bring your own beer/booze  自带酒水。  例句:  Since beer in the US is expensive, we go to bring your own bottle (BYOB) parties, play games and get all crazy.  因为啤酒在美国很贵,我们会自己带酒水聚会,玩游戏,尽情狂欢。  5、RIP  拉丁文Requiescat in Peace  每当国外有名人偶像去世,国外社交网站上会看到无数RIP的评论。