经过几次反复尝试 After several repeated attempts
经过几次反复的尝试 After several repeated attempts
经过几次尝试
After several attempts
以上为机器翻译结果，长、整句建议使用 人工翻译 。
经过几次尝试后，他技艺变得更加精湛，开始与来自世界各地的人下国际象棋。
Having tried several times, he became better and began to play chess with people from around the world.
youdao
经过几次尝试，他们最后成功了。
After several tries they finally succeeded.
要经过几次尝试和出错之后才能选好要使用的值。
Choosing the values to use involves some trial and error.
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