The existence of displacement costs also counsels gradualism in the removal of existing trade barriers.由于转移费用的存在,因而建议在取消现有贸易壁垒时采用渐进主义.I would err on the side of gradualism and do it in stages.我曾经在过于坚持渐进主义上面犯过错误,我把他叫做阶段性错...