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。

youdao

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。

youdao

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。

youdao

It shows that the risk of fisheries collapse has recently decreased in some areas some,but not all.

VOA: special.2009.08.11

OK, and you can see that this thing ought to unwrap, it's going to keep extending out those multiplications until gets down to the base case, going to collapse them all together.

好，你可以看到这种方法,是怎么解决的,他一层层的将乘法展开一直到最底层,然后将他们一起乘起来。

麻省理工公开课 - 计算机科学及编程导论课程节选

That's because it's here where the rigid polarities between light and dark and good and evil, all of these absolute oppositions, begin to collapse.

这是因为这里就是光与暗,善与恶之间严格的两极分化，及所有绝对的对比开始崩塌的地方。

耶鲁公开课 - 弥尔顿课程节选

If Pakistan fails to pay its debts, trade is likely to slide rather than to collapse all at once.

ECONOMIST: The crumbling of Pakistan

Physician and insurer groups like to collapse all conversations about cost growth in health care to malpractice reform, while their opponents trivialize the role of defensive medicine.

FORBES: The True Cost Of Medical Malpractice - It May Surprise You

If the Sharif case were to collapse then all the other cases would collapse with it because they're all linked.

BBC