在前一种情况下，你可能能够读完一章。
在前一种情况下，当容器被复制构造时，分配器会被复制。
In the former case, the allocator is copied when the container is copy-constructed.
在前一种情况下，用不了多久，歌手就可以合成背景人工歌曲。
In the former case, it looks like it won't be long before singers can employ synthesized backup singers.
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