《21世纪》:美国国会众议院1月28日通过的总额为8190亿美元的新经济刺激方案中规定,构成经济刺激计划主体的基建项目,包括联邦建筑和学校,除极个别例外,将禁止使用外国进口的钢铁材料。而之后于参议院讨论的文本,则要求所有经济刺激计划项目,必须使用美国制造的设备和商品。如何评价这一条款? “21st Century”: The new economic stimulus package passed by the U.S. House of Representatives on January 28 for a total of $ 819 billion stipulates that infrastructure projects, including federal buildings and schools, which will form the bulk of the stimulus package will be banned for a few exceptions Foreign imports of steel materials. The text that was discussed in the Senate later required all stimulus programs to use U.S.-made equipment and goods. How to evaluate this clause?