A typical core does not collapse all the way down to a single star.

一般的云核并不会直接一路塌缩成单一恒星。

Should I err on the side of accuracy as it is now, or collapse all whitespace?

我是该精确地显示出每个空白字符呢，还是该将其全部压缩？

A useful feature to add to your applications is the capability to expand or collapse all top-level tree items.

可以向应用程序中添加一个有用的特性，那就是展开或折叠所有顶级树项目的功能。

The first step is to add the two buttons (lines 28 to 38 in listing 5) that expand or collapse all the tree’s items.

第一步是添加两个按钮（清单 5 中的第 28 - 38 行），用于展开或折叠树的所有项目。

Categorize the view, and initially collapse the categories in the view by selecting the "collapse all when database is first opened" option.

将视图分类，通过选择“ Collapse all when database is first opened ”选项，在一开始的时候就消除类别。