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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
ロープで荷物を結びつけた。
I tied the luggage together with a rope.
研究成果を実用化に結びつけることが課題だ。
The challenge is to link research findings to practical applications.
二つの概念を論理的に結びつけることが難しい。
It is difficult to logically connect these two concepts.