经过他刻苦的努力 Through his hard efforts ; After his hard efforts ; After his painstaking efforts
经过刻苦努力的学习 After hard work of learning
刻苦的努力
Hard work
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他的成功来源于刻苦的努力。
His success came from hard work.
youdao
我相信经过刻苦的努力，我的英语说的非常流利。
I believed after the assiduous endeavor, I able to speak English fluently.
学习中，她觉得这些刻苦的努力会给她带来好运。
As she studied, she felt that all this hard work was making her lucky.
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