其中一个是称为tag的简单字符串。

One of these is a simple string called tag.

youdao

一个是channel类的一个实例(称为channel)。

One is an instance of the channel class (called channel).

youdao

另一个是包含一个或多个item对象的List对象(称为itemlist)。

The other is a List object containing one or more item objects (called itemList).

youdao

This process is called self-renewal, so that's one important process of property stem cells, that they're capable of self-renewal.

这种过程称为自我更新,所以这是干细胞的一个重要性质,它们能够自我更新

耶鲁公开课 - 生物医学工程探索课程节选

The fifth degree of the scale after the tonic is the next most important and it's called the dominant note.

主音后面的区域中五度,是下一个重要的概念,它被称为属音

耶鲁公开课 - 聆听音乐课程节选

This is an example of what is referred to frequently as being a Turing complete language.

答案是基本上什么都可以,这是一个被称为是。

麻省理工公开课 - 计算机科学及编程导论课程节选