由于在指定条件下获得的明胶不能形成胶体，所以事实上不可能测出其凝胶强度。
It was virtually impossible to determine the bloom strength of the obtained gelatin because of its failure to gel at the prescribed conditions.
为了避免将 Search 视图与所有的标准选项纠缠到一起，只是在满足特定的条件下，指定标签，属性组或者属性值的控制才会显示出来。
To avoid cluttering the Search view with all criteria options at once, the controls to specify tags, attribute groups, and attribute values are displayed only when certain conditions are met.
在 Requirement Creation 页面中，在给定的源元素种类条件下，您可以指定创建什么类型的需求。
On the Requirement Creation page, you can specify what kind of requirement to create, given a specific source element kind.
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