Wait on event occurrences with the select() (or a blocking read()) system call.

使用select()（或阻塞的read()）系统调用等待事件发生。

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There are several conditions which cause select() or a blocking read() to return.

几种情况会导致select()或阻塞的read()返回。

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A blocking syscall, like a read will only return once data is available.

阻塞的系统调用，就拿读取来说，直到数据准备好的时候才会返回。

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There's a read hog up ahead who is driving too slowly and blocking traffic.

前面有个司机故意妨碍别人超越，他开得太慢，阻塞了交通。

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There's a read hog up ahead who is driving too slowly and blocking traffic.

前面有个司机故意妨碍别人超越，他开得太慢，阻塞了交通。

youdao