The map function is designed to take a large data input and divide it into smaller pieces, which it then hands off to other processes that can do something with it.
map函数专用于获取大数据输入，并将其分成小片段，然后交由其他进程进行操作。
The map function is designed to take a large data input and divide it into smaller pieces, which it then hands off to other processes that can do something with it.
map函数专用于获取大数据输入，并将其分成小片段，然后交由其他进程进行操作。
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