tariff barrier?

A:王教授，什么是非关税壁垒?

B:Non-tariff barrier is another mean to restrict imporls.

B:非关税壁垒是限制进口的另一种手段。

A: Can you give an example?

A:可以给个例子吗?

B: For example. some countries restrict imports by quantitative restriction.

B：例如，某一国家通过数量上的限定来限制进口。

A: Why?

A：为什么要这样做呢?

B:This is used to protect local industries. or to achieve certain political objectives.

B：这样有利于保护当地产业，或者达到某些政治目的。

A:Oh,Are there other means.

A：哦!还有其他手段吗?

B:Technical barners are set for imported goods.

B:还有为进口商品制定技术性贸易壁垒

A:This is designed to exclude them from domestic market ,it's it?

A:这样就可以把这些进口商品排除在国内市场之外，是吗?

B:Yes,Some countries may use some of the unnecessary health rules to excllude foreigh food.

B:是呀，有的国家还有可能利用一些不必要的卫生规则来排斥国外食品。