- the chances of success are uncertain
- 成: accomplish; succeed
- 不成: won't do
- 一半的机会;没准儿的事儿: a toss―up
- 准儿: [口语] certain; sure 心里有准儿 feel sure; know what one is doing; 成不成没准儿。 the chances of success are uncertain
- 心里有准儿: feel sure
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