barrier

He advocated the removal of trade barriers..他提倡消除贸易壁垒。

trade barrier,贸易壁垒

language barrier,n. 语言障碍

barrier reef,堡礁；堤礁

thermal barrier,热障；保温层；绝热层

great barrier reef,大堡礁

blood-brain barrier,血脑屏障；血脑障壁

tariff barrier,关税壁垒

barrier property,防护性能；隔离性，不透气性

sound barrier,声障（等于sonic barrier）

barrier layer,阻挡层；势垒层

potential barrier,势垒；位垒

non-tariff barrier,非关税壁垒

noise barrier,隔音屏障；隔声板

blood brain barrier,血脑屏障

moisture barrier,防潮层

natural barrier,天然屏障；天然堤

safety barrier,安全势垒，安全栅；停机拦截网

fire barrier,阻火器；防火墙；防火煤柱；防火隔板

protective barrier,遮壁；防护栏杆；防护栅障

barrier system,屏障系统；柱式开采法；栅栏系统