... Module） 需求菜单栏（The Requirements Menu Bar） 需求工具条（The Requirements Toolbar） 需求树（The Requirements Tree） 需求模块 你可以在TestDirector中点击Requirements标签页，来定义你的需求。
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这种药物是从原产于南美洲的金鸡纳树的树皮中提取的。到了1856年，对这种药物的需求已经超过了现有的供应。
The drug is derived from the bark of the cinchona tree, native to South America, and by 1856 demand for the drug was surpassing the available supply.
如檀香的精华就是一种萜烯，[font=宋体][size=10.5pt]对其浓烈香味的需求导致了产此香精的檀香树变得稀缺。
Sandalwood essence, for example, is a terpene, and the demand for its potent smell means the tree it comes from is becoming rare.
需求明显地区别于文档中附加的描述性信息(如图2)，这使得“看清森林中的树”变得更加容易。
Requirement text is visually differentiated from additional descriptive information in the document (see Figure 2.). This makes it easier to "see the trees in the forest."
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