ASAP
=as soon as possible
尽快，越快越好
■ 例句：
We need to speak with her asap, please.
我们需要和她尽快通话，拜托了。
BTW
=by the way
顺便说一下
■ 例句：
BTW, what is your home phone number?
对了，你家电话是多少？
AL
=annual leave
带薪年假
■ 例句：
She is on annual leave.
她休年假去了。
FYI
=for your information
供对方参考
■ 例句：
FYI, don't miss out the greatest opportunity!
知会一声，别错过一个绝佳机会。