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to tie (to); to fasten; to attach; to join; to bind
to connect (one thing with another); to link; to bring together; to combine; to associate
動機と行動を結び付けた。
I connected the motive with the action.
二つの事件を結び付ける証拠が見つかった。
Evidence linking the two incidents was found.
研究者たちは二つの現象を結び付けて考察した。
The researchers linked the two phenomena and examined them together.