首先，我们可以尝试看一下菜单上有什么。

Firstly, we can have a good stab at what will be on that menu.

youdao

我们已经涉及到了DTD菜单下大部分项。

Most of the items under the DTD menu have been covered.

youdao

咱们看一下菜单上有什么。

Let's see what they have on the menu.

youdao

If you've ever been using some program, you did something completely innocuous, pull something down from a menu, click a button, you didn't do anything wrong and yet all of a sudden the thing just starts hanging there or you get a little spinning beach ball or the hour glass or whatever it is.

如果你之前在用一些程序，做一些无伤大雅的事情，拉下一个菜单，点击一个按钮，你没有做任何错误的事情,突然间有东西开始一直运行,或者一个沙滩上的小球旋转,或滴漏或是别的什么。

哈佛公开课 - 计算机科学课程节选

And we had a bunch of drop downs I was able to choose from.

这儿有一些下拉菜单可供选择。

哈佛公开课 - 计算机科学课程节选