An application runs until the heap is exhausted of free memory, at which point the GC stops all application code, performs a garbage collect, and then lets the application continue.

应用程序一直运行，直至耗尽堆的可用内存，此时GC停止所有的应用程序代码、执行垃圾收集，然后让应用程序继续运行。

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It's the long-lived objects, such as ones you might pool, that are expensive to garbage collect.

只 有那些生存周期很长的对象，才适合使用对象池技术，因为对它们进行垃圾回收的成本很高。

youdao

The code in Listing 4 shows how the Garbage Collect command is implemented.

清单4中的代码展示了Garbage Collect命令是如何实现的。

youdao

The Zabbaleen collect the garbage in Maadi and sort it -- often in their own homes -- for recyclers.

CNN: Homes for the Zabbaleen

In one of the favelas, outside of the city, one woman (Regina Silva Gomes) decided that she would collect local garbage and exchange it for food lead a project to clean up the community, where the streets were littered with trash and infested with rodents.

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The Zabbaleen collect 200 tons of garbage a day at no cost to the city.

CNN: Homes for the Zabbaleen