| 词组 | be onto a good thing | 
| 释义 | be onto a good thingv. phr.To understand and avail oneself of a fortunate circumstance. 利用有利可图的机会。◆ Jim's secret as a writer is that he always knows when he is on to a good thing.吉姆作为一个作家的秘诀在于他总是知道什么时候能利用有利可图的机会。 | 
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