习惯用语give sb. an assurance that ...1.给某人保证have full assurance of1.完全相信have (an) easy assurance of manner1.有悠然自信的态度make assurance doubly sure1.加倍小心, 特别慎重make assurance double sure1.加倍小心, 特别慎重shake sb. 's assurance1.动摇某人的信心with assurance1.有把握地, 自信地特殊用法automobile assurance1.汽车保险life assurance1.人寿保险negative assurance1.消极保证