Updating knowledge is a fundamental requirement for a highly qualified teacher.

更新知识是对于一个高度合格的教育者的最基本的要求。

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Of course you have to keep updating your knowledge of the streets, because the city changes.

当然，你必须不断更新你对街道的了解，因为城市在变化。

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The effect of cultural inertia over time is that we as a community are much better at adding to our body of knowledge than we are at updating it.

文化惰性随时间推移的结果在于，作为一个社区，与更新我们的知识体系相比，我们更擅长于向我们的知识体系添加新内容。

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