Notice the form of it, it's just the name of the class followed by open paren, close paren, treating it like a function.

我该怎么来使用类呢？,好，我可以像调用方法,一样调用类，你可以在下面看到，创建一个名为。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, you just say, well, this is like a bullet going through pumpkin.

你会说，好吧，这就像一颗子弹穿过南瓜一样。

麻省理工公开课 - 固态化学导论课程节选