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重要な役割を果たした

played an important role

→ 重要だ
phrase Rare #42,017
played an important role Used to say that someone or something made an important contribution to an activity, development, or outcome. 役割を果たす literally means “fulfill a role.”
JA: 彼女はこのプロジェクトの成功に重要な役割を果たした。
EN: She played an important role in the success of this project.

石油は日本の産業の進歩に重要な役割を果たした。

Oil played an important role in the advancement of Japanese industry.

彼は委員会の中で重要な役割を果たした。

He played an important role on the committee.

湯川博士は科学研究に重要な役割を果たした。

Dr. Yukawa played an important role in scientific research.

彼は我々の科学研究に大変重要な役割を果たした。

He played a very important role in our scientific research.