She and her husband are self-employed in the trucking business.

她和她丈夫是做个体运输的。

Connie operates a trucking business in North Carolina, the USA.

康妮在美国北卡罗来纳州经营一家卡车公司。

I mean, the U.S. Treasury, which also is invested in this company, knows nothing about the trucking business.

我的意思是，美国财政部也投资了这家公司，但对卡车运输业务一无所知。