trial of luck
碰运气
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Lots of trial, error, and sometimes a little luck.
通过大量的试验、错误，有时候还需要一点点运气。
youdao
It was caused by the lack of holiday and early start to the Champions League, the Calciopoli trial, injuries and bad luck, so it all came together.
这所谓的危机是为夏天假期过短、备战冠军联赛资格赛、伤病和坏运气一起导致的。
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