on to a good thing的意思|示意

As the only doctor in the town, he's on to a good thing.

作为镇上惟一的医生, 他很赚钱.

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You are on to a good thing.

你看得真准.

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They run the only shop in the district that caters for vegetarians so they're on to a good thing.

他们在该地区经营着唯一的一家供应蔬菜的商店，因此他们的生活非常好。

She's on to a good thing in her new job: high wages, practically no income tax and a rent-free house.

她找到的新的工作可真舒服：工资高，几乎不必纳所得税，而且还有一座免交租金的房子。

Lena, , realising she was on to a good thing, took the chance to pose another problem, this time (90+27)+(29+15).

莱娜意识到自己碰到了好事，于是借此机会又提出了另一个问题：（90+27）+（29+15）x2。