trucking

n [U] (US) business or process of carrying goods by road 公路货运（业）.

trouble-spot, troubled, troublesome, trough, trounce, troupe, trouper, trouser, trouser-suit, trousers, trousseau, trout, trowel, troy weight, truancy, truant, truce, truck, truck farm, trucker, truckle, truckle-bed, truculence, truculent, truculently, trudge, true, true north, true-blue, true-hearted, true-life, true-love, truely, truffle, trug, truism, truly, trump, trump-card, trumpery,