[, ] () the fact of goods and people being able to pass freely between countries边境开放（货物和人能在国家间自由流动）◆an open border and free trade between the US and Mexico美国和墨西哥之间的边境开放和自由贸易◆Local producers complain that the open borders policy has pushed down prices.当地生产商抱怨说开放边境政策压低了价格。