Arranging visual elements on a page must consider the flow of a page, which is top to bottom and left to right for most countries, and the natural order those elements are to be used.
在页面上组织可视化元素时必须考虑页面流，对大多数国家来说都是从上到下，从左到右，同时遵循这些元素的自然顺序。
Additional visual observations are usually in order to establish the advent of unsteady flow, intermittent stall, and full stall.
通常采用另外一些目视法来确定非常定流断续失速和全失速的出现。
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