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to endeavor (to do); to endeavour; to try hard; to work hard; to strive; to make an effort; to exert oneself; to devote oneself; to be committed (to doing)
目標達成のために努める毎日を送っている。
I'm spending my days endeavoring to achieve my goals.
品質向上に努めることが大切だと思う。
I think it's important to endeavor to improve quality.
彼は常に誠実であることに努めている。
He always endeavors to be sincere.