For example, your test system might come from Mercury while your source control system is open source.

举例来说，您的测试系统可能来自Mercury，而您的源控制系统是开源的。

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The pollution source of amorphous dust resulted from open-air coal stocking yard is specialized with large area, which is difficult to control.

本文通过采用在储煤场周围设置防风抑尘墙，降低储煤场内风速，从而实现有效控制储煤场无组织扬尘污染。

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"Open source gives a level of control that proprietary software from the likes of Microsoft and HP do not give, " explains Kusnetzsky.

BBC: Linux takes on MS in China