双语例句原声例句
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票以种类在三分类里提供 4 保留专门地对南非的居民。
Tickets are available in three categories with category 4 reserved exclusively for South African residents.
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So there are three main geographical subdivisions.
有三种主要的地理形态分类。
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So let's think about how we can classify single and double and triple bonds, which is what we're really used to dealing with in terms of these sigma bonds and these pi bonds.
让我们想想怎么来分类单键双键,和三键，这在我们在考虑sigma键,和π键是很有用的。
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