This article states the compile circumstance and main matter of the standard.
本文概述了标准的编制情况和主要内容。
In this article we will examine air traffic control in the United States.
在这篇污衤中，我们将更详细的了解关于美国的空中交通管制系统。
This article introduces the correct way f drawing the line and states its theoretical basis.
本文介绍了它的正确画法，并指出其理论根据。
This article introduces the correct way f drawing the line and states its theoretical basis.
本文介绍了它的正确画法，并指出其理论根据。
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