requirement for需要, 需要的东西, 要求requirementn.必要条件；要求requirement of written form书面形式上的要求requirement for restriction[法] 限制要求requirement characteristics需求特征requirement plan organizing需要量计划编制requirement of effectiveness生效要件Requirement of heath service卫生服务需求requirement on water quality水质要求requirement description frame需求描述框架requirement present situation需求现状requirement for anticorrosion防腐要求