barrier to migration

常见例句

To break of urban-rural census register barrier to citizens free flow and migration.
才能打破城乡分割的户籍壁垒，实现公民的自由流动和迁徒。
A model that reproduces the coupled deformation and two-phase flow(with special interest to gas migration) through a waste containment engineered barrier system has been developed.
建立了高放废物工程屏障体系变形与二相流（偏重于气体迁移）的耦合模型。
Eighteen million years ago, a series of remarkable events conspired to creat the great barrier reef--the migration of a continent, the might of an ocean, and the full power of the tropical sun.
一千八百万年前，一系列重大事件一同策划创造了大堡礁—大陆移动，强大的海洋，热带太热的全部力量。