Otherwise I'm going to check to see is the first and last, there's that - 1 indexing, is the first and last element of the string the same?

是第一个还是最后一个,这就是这边-1的索引内容，这个字符串的第一个,和最后一个的内容是否相同呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

Before eating the last slice, you could check with your friends to make sure it's alright for you to delve in.

在伸手拿最后那片披萨前，你可以跟你的朋友确认下，你吃完最后一片有没有关系。

Is it okay 课堂 - SpeakingMax英语口语达人

And the last thing we do for any of our structures to check them and figure out are these valid or not valid, are these good Lewis structures is to check the formal charge.

而为了检验任何一个结构是否有效,看它们是不是好的路易斯结构,我们要做的最后一件事就是检查形式电荷。

麻省理工公开课 - 化学原理课程节选