He cut his teeth breaking up a mob-connected trucking cartel[2].

在打破勾结犯罪团伙垄断货车运输业的某卡特尔一案中，他小试牛刀。 （译注：cut one’s teeth [on sth.]

youdao

Cameron cut his teeth as an assistant to B-movie producer Roger Corman and, even now, seems content to rely on stock genre narratives.

在担任B级电影制片人罗杰·科尔曼(Roger Corman)的助理期间，卡梅隆获得了拍摄电影的初步训练。甚至现在，他似乎依然心满意足，依然依赖于这种陈腐的类型电影。

youdao

Mr Musca cut his teeth at the French Treasury, working for Mr Trichet during the talks that led to the 1992 Maastricht treaty, the foundation of the euro.

米斯卡首先在法国财政部崭露头角，1992年在达成作为欧元基础的马斯特里赫特条约的会谈中，他就一直为特里谢工作。

youdao

But DeWitt, who cut his teeth at Cisco and Sun, may be on to something.

FORBES: Magazine Article

He himself cut his teeth in lowly posts in Roosevelt's administration and in Truman's budget office.

ECONOMIST: Richard Neustadt

Ghosn (rhymes with loan) cut his teeth gnashing costs at tire-maker Michelin and later Renault in Europe.

CNN: Business Buzz