Teaching is an art and a craft, talent and practice; it is not something that just anyone can be good at.
教学是一门艺术、一门手艺、一门才能，也是一门实践；这不是随便一个人都能做好的事情。
View IDs need not be unique throughout the tree, but it is good practice to ensure that they are at least unique within the part of the tree you are searching.
视图ID不需要在整个树中唯一，但至少在你搜索的树中确保其唯一是比较好的做法。
It is not a good time to be a paleographer or numismatist, pursuits that we will soon not even be able to spell, let alone practice.
对古文书学家或者货币学家来说，这不是好时候。 这些职业名称我们很快就不能拼写出来了，更不要说做这种工作了。
It is not a good time to be a paleographer or numismatist, pursuits that we will soon not even be able to spell, let alone practice.
对古文书学家或者货币学家来说，这不是好时候。 这些职业名称我们很快就不能拼写出来了，更不要说做这种工作了。
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