无目的微笑不不过是我决心去做的一个例子而已，我想感受：如果人们假定情绪能影响行为，反过来，行为也能影响人的情绪。
Random smiling is an example of my resolution to act the way I want to feel: while people suppose that feelings inspire actions, in fact, actions also inspire feelings.
假定同一模板的每个实例的行为都一模一样是不符合现实的。
It is not realistic to assume that each instance of the same template is supposed to behave exactly the same.
Mobile Safari 的默认行为将假定 Web 站点的宽度为 980 像素，并且把它收缩三分之一以适应 iPhone 的可视区域。
The default behavior of Mobile Safari is to assume that the Web site is 980 pixels wide and shrink it by about one-third to fit in the viewable area of the iPhone.
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