名词
中文翻译：努力
同义词：
['effort', 'exertion', 'strenuous effort']
例句：
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1.She put in a lot of mean effort to finish the project on time.
她付出了很多努力，按时完成了这个项目。
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2. The teacher gave us a mean effort to help us understand the lesson better.
老师给了我们很大的努力，帮助我们更好地理解这节课的内容。
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3.He made a mean effort to save the old car from being scrapped.
他做出了很大的努力，试图挽救那辆旧车不被报废。