Long-lived objects tend to accumulate at the bottom of the heap, so they are not copied repeatedly as they are in a copying collector.

长寿的对象趋向于沉在堆的底部，这样就不会像在复制收集器中那样反复复制它们。

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Therefore, the bottom line is that you can never guarantee that an available object will ever be collected by the garbage collector.

因此，概括地说，您永远无法保证可供收集的对象总是会被垃圾收集器收集。

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When water temperature higher than the tank bottom water collector top of several degrees, water temperature control device will start water make the water flow.

当收集器顶端水温高于储水箱底部水温若干度时，控制装置将启动水使水流动。

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The most common batteries are made up of negative and positive halves (the anode and the cathode), a material to separate them, and "current collector" layers at top and bottom to gather up the electric charges moving through.

BBC: 'Paint-on' batteries demonstrated