There is not enough knowledge or time to optimize for all users based on their wishes and behavior — which might also change over time.

没有足够的知识或时间来根据所有用户的需要和行为为他们进行优化——而这些需要和行为还可能随时间改变。

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People is largely based on his intentions and thoughts, based on his knowledge and insight and talk, but their behavior is based on their habits.

人们大半是依据他的意向而思想，依据他的学问与见识而谈话，而其行为却是依据他们的习惯。

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Distance estimation is the behavior in actual spatial environment, which is based on acquiring the distance knowledge.

环境空间距离估计任务就是获取环境空间距离知识基础上的实际空间行为。

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