例句與造句

1. Sadow's four-wheeled suitcases, pulled using a loose strap, were later surpassed in popularity by rollaboards, suitcases that feature two wheels and are pulled in an upright position using a long handle, and were invented in 1987 by US pilot Robert Plath.
2. It's difficult to find rollaboards in a sentence. 用rollaboards造句挺難的