Similar to real life mailing, e-mail navigates around "servers".

与现实生活中的邮寄相似，电子邮件也是通过服务者传输的。

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In every P. E. class we all need to run three laps around school track.

每次体育课我们都必须跑三圈学校操场。

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In every P. E. class we all need to run three laps around school track.

每次体育课我们都必须跑三圈学校操场。

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