They correspond roughly to small municipal, medium-sized metropolitan and major metropolitan airports respectively, and encompass an increasingly rigorous set of regulations. 它们分别大致相当于小型市政机场、中型都市机场和大型都市机场,并包含一套日益严格的规章制度。
They built a moat to encompass the castle. 他们在城堡周围修了一条护城河。
The map shows the rest of the western region, encompassing nine states. 这地图显示了其余西部区域,覆盖了9个州。