... keep oneself alive让自己活下来 in times of real need真正需要的时候 ┌be free from care无忧无虑的 ...
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其思想是预分配一个内存池，并保留到真正需要的时候。
The concept involves pre-allocating a pool of memory and reserving it until it is actually needed.
他们把这些信息放到哪里，又为什么我们在真正需要的时候往往获取不到呢？
Where does it put this information, and why can't we get to some of that information when we really want it?
因此，你应该小心的使用这些功能，只在你真正需要的时候才这样做。
You should therefore be careful to use these features only when you actually need them.
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