When traffickers are caught, they usually only face charges for one shipment.

当贩运者被捕时，他们通常只面临一批货物的指控。

But the methods Wasser's group developed can link individual smugglers to more than one shipment, and to each other.

但是Wasser 的小组开发的方法可以将个别走私者与不止一批货物联系起来，并且可以相互联系起来。