you could characterize them in terms of how they're gated, -- and basically how they open or close -- that's one way to talk about different types.

你可以通过闸门的类型来描述它们，这基本上也就是看它们是如何打开或关闭的-,这是一种讨论不同类型的方法。

麻省理工公开课 - 化学原理课程节选

The question is how do you get those readings and how do you access them?

问题是如何获取这些资料,并打开它们

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

When the gentleman brought it and install it in my bedroom here, they gave me one simple sheet to tell me how to turn it on, how to get into the program, and then program really explain itself, really invites you to explore the pieces of it, by itself, I mean.

当他们把电脑带来,安装在我的房间里，给了一个简单的小册子,告诉我如何打开电脑，如何运行这个程序，然后程序就自动开始解释了，它让你去探索每个部分，自动的，我是说。

麻省理工公开课 - 媒体、教育、市场课程节选