"With our turtle release program, it is a compensation-based program where when the fishermen give us a call to go and rescue a turtle, we check the biometric measurements, tag the turtle, and compensate the fishermen for the time and effort they have taken to save these turtles and call us."

VOA: standard.2010.07.15

So if I want to use a string as we'll call it which is a word or phrase generally, they always go between double quotes, David hence the quotes around David, and they are double quotes not single quotes intentionally.

当我们要表示单词啊，词组啊，句子啊等等这样的东西时,就会用到字符串，它们位于双引号之间，也就是这里双引号之间的，是双引号，不是单引号哦。

哈佛公开课 - 计算机科学课程节选

Let's call it a day and go home.

今天到此为止吧，大家回家吧。

Let's 课堂 - SpeakingMax英语口语达人