to hammer away at
[phrase form: hammer]
01
懸命に取り組む, 粘り強く続ける
to make a great and persistent effort in order to accomplish or resolve a task or problem
例
He continued to hammer away at his research project until he found a breakthrough.
彼はブレークスルーを見つけるまで、研究プロジェクトに取り組み続けました。
