注:现在分词、不定式、过去分词都可以作独立成分 generally speaking一般说来;frankly speaking坦白地说;judging fr om/by...根据……来判断;considering.../taking...into consideration考虑到……; to tell you the truth说实话;seeing...考虑到……;supposing假设,如果;providing如果;given考虑到,鉴于;provided that如果
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