一个国家不能闭关自守。

A nation can't live isolated.

闭关自守的经济不会使一个国家富起来。

A closed economy will not put a country on the way to prosperity.

过去实行“闭关自守”政策，结果搞得“民穷财困”。

We pursued the policy of “self-seclusion” in the past, resulting in “the destitution of the people and exhaustion of the financial resource”.

虽然看起来有点儿矛盾，但一个只看电影盲目排外的影评人只能写出闭关自守、目光短浅的文章来。

Although this may seem contradictory, the film critic who only watches films to the exclusion of all other pursuits will deliver introverted, myopic reviews.