They have persistently denied claims of illegal dealing.

他们一再否认进行非法交易的说法。

《牛津词典》

According to the police statement, Mr Frederiksen is wanted by police in Denmark for alleged illegal dealing in firearms.

BBC: From the section Africa

In Surrey, reports involve the illegal dealing of sheep across three county borders, while, in Cornwall, officials targeted dealers and farmers trading hundreds of cattle without keeping records including animal passports.

BBC: Foot and mouth rules set to be eased

The war on drugs has led to harsh sentences not just for dealing illegal drugs, but also for selling prescription drugs illegally.

ECONOMIST: Crime and punishment in America