作者特别描述了每一层的详细职责。

In particular, the authors provide the detailed responsibilities of each of these layers.

youdao

识别每一层可以授予权限的用户和组。

Identify the users and groups that can grant permission at each level.

youdao

每一层能够给每个像素的不同的透明。

A layer mask can give individual pixels different opacities.

youdao

Well, notice again, on each level of the tree, when I actually do the merging, so this remember, is when I wrote down just the numbers when I bottomed out with the list of size 1.

请注意，在这棵树中的每一层，我真正做合并时，就将每个大小为1的列表中的,数字写下来。

哈佛公开课 - 计算机科学课程节选

and they have like, honestly 200 people per floor

那里每一层差不多有200人

住宿环境怎样？ - SpeakingMax英语口语达人

One, two, three, four, so on each level of the picture I'm drawing, I've seem only to be looking at each number once.

，2，3，4，可见，在我画的,这幅图的每一层上，对每个数字,都只会用到一次。

哈佛公开课 - 计算机科学课程节选