curb

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 ~ (on sth) thing that restrains or controls 起约束或控制作用的事物:
* put/keep a curb on one's anger, feelings, etc 抑制怒火、 感情等
* government curbs on spending 政府对开支的限制. 
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 strap or chain passing under a horse's jaw, used to restrain the horse 马勒, 马嚼子（横放在马嘴里的皮带或铁链, 用以驾御马匹）. 
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(esp US) = kerb. 
派生： curb v [Tn] 
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 prevent (sth) from getting out of control; restrain 防止（某事物）失控; 约束: curb one's anger, feelings, etc 抑制怒火、 感情等
* curb spending, waste, etc 限制开支、 浪费等. 
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 control (a horse) by means of a curb 勒住（马）.