1. Carnegie Mellon University has even published a study that calls the technology inefficient and cost-
prohibitive.
卡内基梅隆大学，甚至发表了一份研究报告，要求的技术效率低下，成本过高。
2. A higher tariff wall, which, however, is not
prohibitive, will produce the same kind of results as this, but merely to a smaller degree.
就算关税壁垒不是完全禁止性的，仍然会产生同样的结果，只不过损害程度小一些而已。
3. The cost of operating an automobile has become
prohibitive for some people in the United States -- especially students and others with limited means .
对有些住在美国的人来说，尤其是对学生和收入不多的人来说，私人汽车费用已经高得使人不敢问津。
