在南非著名的克鲁格国家公园附近的南十字学校，这是一个普通的上学日。

It's a common school day at Southern Cross School near the famous Kruger National Park in South Africa.

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描述符可以表示到设备、管道或套接字的连接，这些连接用于与另一个进程或普通文件进行通信。

Descriptors might represent a connection to a device, pipe, or a socket for communicating with another process or to a normal file.

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除了trait关键字，Subject看起来就像一个普通的类。

Except for the trait keyword, Subject looks like a normal class.

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