The easy thing to do would be the following: start at the front end of the list, check the first element. If it's the thing I'm looking for, I'm done. It's there. If not, move on to the next element. And keep doing that.

从数组的第一个元素开始：,如果这是目标元素那么结束,如果不是的话就继续比较下面的元素，并一直这么比较下去,但如果，在某一点我发现我要寻找的数字。

麻省理工公开课 - 计算机科学及编程导论课程节选

and you had planned to go on a Dutch pay but at the end of the meal, the friend offers to take the check.

你本来希望两人各自付账，但吃完饭后，你朋友便主动买单。

I will 课堂 - SpeakingMax英语口语达人

Always check your sign at the end.

一定要记得检查符号。

麻省理工公开课 - 热力学与动力学课程节选