当人们旅行时，拍照大概是标准行程。

It's pretty standard practice that when humans travel, they take photographs.

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并行虚拟机(PVM)曾经是一个非常流行的并行编程平台，但是最近MPI已经成为了为集群编写并行程序的事实标准。

Parallel Virtual Machines (PVM) were once a popular parallel programming platform for this, but lately MPI has become the DE facto standard for writing parallel programs for clusters.

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很多命令行程序，是通过发送它们的处理结果到一个叫做标准输出的设备，来达到显示命令的处理结果。

Most command line programs that display their results do so by sending their results to a facility called standard output.

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