And I want to show you an example of this, to lead to both the syntax, and to the semantics.

我要给大家讲一个例子，让大家学习语法，和语义。

麻省理工公开课 - 计算机科学及编程导论课程节选

And I want to describe both the syntax, what we're doing, and then the semantics of how do we use it and what does that mean.

现在我想解释一下语法，我们在做什么,还有我们使用时的符号,以及意义。

麻省理工公开课 - 计算机科学及编程导论课程节选