[] a rule or an agreement that limits what a person, group, country, etc. can do 约束力；管制措施；制约因素◆They claimed that the ban on the import and testing of GM crops is a restraint of trade. 他们声称禁止进口和检验转基因作物是一种贸易管制。
[] the act of controlling or limiting sth because it is necessary or sensible to do so 控制；限制◆Employers continue to exercise restraint in pay increases. 雇主继续限制加薪。