knock.a.boutadj.(形容词)Boisterous; rowdy.喧闹的;吵闹的Appropriate for rough wear or use:朴素的,粗陋的:适合于便穿的或粗用的:例句:a knockabout overcoat.一件粗陋的外套n.Nautical (名词)【航海】 A small sloop with a mainsail, jib, and keel but no bowsprit.单桅帆船:有一个主帆、三角帆和龙骨但没有船首斜桁的单桅小帆船