动词短语
中文翻译：坚持做某事
同义词：
['persevere', 'persevere in', 'persist in']
例句：
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1. I'll keep at it until I finish this project.
我会一直努力直到完成这个项目。
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2.She kept at it even when she felt tired.
即使她感到疲倦，她也坚持不懈。
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3.The team kept at it and managed to finish the project on time.
团队坚持不懈，按时完成了项目。