A: Professor Wang, what is non-tariff barrier?
王教授，什么事非关税壁垒?
B: Non-tariff barrier is another mean to restrict imports.
非关税壁垒是限制进口的另一种手段。
A: Can you give me an example?
可以给我一个例子吗?
B: For example, some countries restrict imports by quantitative restriction.
例如，某一个国家通过数量上的限制来限制进口。
A: Why?
为什么要这样做呢?
B: This is used to protect local industries, or to achieve certain political objectives.
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?
哦!还有其他手段吗?
B: Technical barriers are set for imported goods.
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, isn't it?
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 unncessary health rules to exclude foreign food.
是呀，有的国家还有可能使用一些不必要的卫生规则来排斥国外食品。
“exclude...from...”是“把……排除在外”的意思。例如：We can not exclude the children of migrantworkers from the classroom. 我们不能把农民工的孩子排除在教室之外。
