短语词组短语infrequent pulse 稀脉;慢脉infrequent a 稀少的infrequent relapses 不常发infrequent t 很少发生的;稀有的infrequent item 非正常项目Infrequent Vacations 不经常休假infrequent gas 罕见气体Not Infrequent 并不罕见infrequent menstruation 月经稀少;翻译 返回 infrequent