先为自己着想

look after number one───照顾私利，为自己打算

do a number on───伤害…的感情；彻底挫败；嘲笑

do number one───小便

enormous number of───大量

go to bat for someone───为某人击球

look out for───留心，提防；留意找，设法得到

make number one───做第一名

One thing to do is look for a number whose range you can predict broadly, and just see what it comes out as when read both big-endian and little-endian.───要做的一件事是寻找一个预测范围很大的数字，看一下当读取高位优先和低位优先时到底是什么情况。

I always look out for number one.───我总是先为自己着想.

So, you better look out for number one.───所以，你最好留心第一个。

one husband told me, "The old saying was" Look out for Number one ", But we 've learned to "Look out for Number two.───有个做丈夫的曾对我说：“俗话说人都要先为自己着想，”但是我们学会了“为他人着想照顾爱人的利益”。

Look out for number one and try not to step in number two. Rodney Dangerfield