Always clean up after yourself 要做一些清理工作
Finally, you must clean up after yourself by leaving the current namespace scope.
最后，在离开当前名称空间作用域之前，您必须自己做一些清理工作。
But the Garbage Collector is not magic: you need to clean up after yourself, too.
但是垃圾收集器没有魔力：你也需要在背后进行清理。
Clean up After Yourself: Nobody likes the role of the "maid" - if you spill something on the floor, clean it up!
收拾好你的摊子：没有人喜欢做“女佣”——如果你把什么东西洒在地板上了，自己把它打扫干净。
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