The sub-shell (wrapped in parentheses) performs a series of tasks-albeit sleep delays in this contrived example-and emits output to a Zenity progress meter via a pipe.

sub - shell(包含在括号中)执行一系列任务—在这个人为例子中albeit sleep延迟—且通过一个管道将输出发出到一个Zenity过程表。

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Watt-Hour Meter A watt-hour meter records the total power output at a specific point in a system. Typical recording increment is in kW-hours.

电度表电度表记录系统中某一点的总电力输出，通常以千瓦时为记录单位。

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The network module calculates the output pulse of electric meter and transmits to computer by network, make the deferent distance more farther.

电子式电能表输出的脉冲信号经过网络模块的统计换算通过以太网传输给管理计算机，使得传输距离不受约束。

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That might be about to change, though, as South Korea's state-owned Korea Electronics Technology Institute has announced a new image sensor chip that promises to take "vibrant photos" in extreme low-light conditions -- all the way down to 1 lux, which is the equivalent light output of a candle shining one meter away.

ENGADGET: South Korean image-sensing chip enables 1-lux photography