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どうして, 如何して
1. how, in what way, by what means
2. why, for what reason, for what purpose, what for
3. cannot possibly
4. no way
如何、以何种方式、通过何种手段;为什么,出于什么原因,为了什么目的
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結びつく, 結び付く, むすびつく
1. to be related, to be connected, to be joined together
2. to result in, to lead to, to bring about
相连、相通、相联;产生、导致、带来