《网络程序》跟踪观察了40种浏览器。

Net Apps tracks about 40 different browsers.

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观察跟踪器窗口也不是最好的方法，跟踪器有时会在你不注意的情况下跳到另一个看似类似的特征点上。

Using the tracker window is not always the best way as it could jump to a similar looking feature which you won't notice.

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方法：采用择时挤压造模方法，用监视器、照像机跟踪观察记录其造模过程及造模后表情行为变化。

Method: Adopting the method of selecting time to make model, using monitor and camera to observe and record the change of expression and action during and after making modes.

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