restrictiveadj.限制的；拘束的；限定的n.限定词Restrictive Action羁束行政restrictive clause限制性从句restrictive phrase限制性短语restrictive ligand限制性配体restrictive budget抑制型预算restrictive policy限制性政策restrictive factor制约因素Restrictive Clauses限制性条款restrictive article限制性条款restrictive measure限制措施

1. The amino acids are essential nutrients for animals to obtain protein balance and the restrictive amino acids are key factors for animals to obtain protein balance nutrients.
   摘要氨基酸是动物获取蛋白质平衡必需的营养，限制性氨基酸是动物获取蛋白质平衡营养的关键。