required by law or rules; compulsory
法律(或规则)规定的;强制的,必须遵守的
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wearing helmets was made mandatory for pedal cyclists .戴头盔已成为对骑脚踏车者的法律规定。
of or conveying a command
命令(性)的
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he did not want the guidelines to be mandatory .他不想让这些指导原则带有强制性。
variant spelling of
同<Bold>MANDATARY</Bold>.
"late 15th cent.: from late Latin