5% And, it turns out that about 75% of the periodic table falls into this category.

而且，它表明元素周期表的,都属于这个种类。

麻省理工公开课 - 固态化学导论课程节选

This is very simple but it's a great way to ask about a specific category among many different categories.

这是个非常简单的句型，但它在询问不同种类中某一特定类型的事物时是非常理想的句型。

What kind of 课堂 - SpeakingMax英语口语达人

And that's going to be valuable to me when I want to get back to using these things, right?

时髦的东西,这代表了它的种类是,笛卡尔坐标？

麻省理工公开课 - 计算机科学及编程导论课程节选

It has the capability of becoming any kind of cell within the body, in fact, that's what it does.

它能成为身体内任何种类的细胞,事实上,这也就是它的功能

耶鲁公开课 - 生物医学工程探索课程节选

So that's the important take-away message from this slide. If we think about these different types of lights, microwave light, if it's absorbed by a molecule, is a sufficient amount of frequency and energy to get those molecules to rotate. That, of course, generates heat, so that's how your microwaves work.

重要的信息，如果我们看看,这些不同种类的光，微波,如果被分子吸收，它的频率和能量可以,使分子转动,这当然的，会产生热量,这就是你们微波炉的工作原理。

麻省理工公开课 - 化学原理课程节选

It's a common bacterium and most strains of E. Coli are not harmful to people, in fact, they provide us with some beneficial properties.

它是常见菌,且大多数种类的菌株对人类无害,实际上还给了我们颇多裨益

耶鲁公开课 - 生物医学工程探索课程节选