Since the typical browser can easily infer from the enclosed source that it is an HTML or XHTML document, you don't really need to include the tag in your source HTML document.

因为典型的浏览器可以很容易地从源文档的内容推断出这是HTML文档还是XHTML文档；所以在HTML源文档中并不一定真正要包含它们。

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Since the source of the jump is contained in a cyclic flow all the activities directly enclosed in this cyclic flow are valid jump targets.

由于跳转的源包含在循环流中，因此，此循环流中直接包含的所有活动都是有效的跳转目标。

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How to computing low frequency sound transfer function from source to receiver in enclosed room has become key problem in small enclosed room auralization.

如何求解封闭空间中声源点到接收点的低频声传递函数已成为目前小尺度封闭空间可听化技术研究的关键问题。

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