And sometimes, it is difficult to find a recognizable ancestor of the test object, so the search has to begin from the top-level object, such as a window.
有时，甚至很难找到测试对象可识别的父类，所以搜索必须从最顶层开始，例如从窗口开始。
The more research we do on more distant species of primates, the better window we have to their common ancestor.
我们对灵长类的远支研究得越多，我们就对它们的始祖了解越多。
The more research we do on more distant species of primates, the better window we have to their common ancestor.
我们对灵长类的远支研究得越多，我们就对它们的始祖了解越多。
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