例句與造句

1. The Dutch had gained an important role in the Baltic trade ( grain especially ) in the 15th and 16th century because of the nature of commodities exchanged ( herring for grain ) and the dominance of the Dutch in the bulk trade due to a structural fall in shipping costs Dutch shippers experienced because of revolutionary innovations in shipbuilding ( wind-driven sawmill ), which brought down construction costs of shipping, and in ship-design ( Fluyt ship that required smaller crews ) at the turn of the 17th century.
2. It's difficult to find structural fall in a sentence. 用structural fall造句挺難的