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a. 确信, 必然的, 必定的
ad. 当然, 确实地, 无疑地
当别人说thanks, 回答sure时,这个词表示的意思是\"应该的\"。
adv.
的确，当然
adj.
对…有把握

sure-enough make sure for sure sure thing sure enough to be sure of be sure to+inf. make assurance doubly sure be sure of foot be sure and... a sure card sure event sure region be sure that as sure as nails as sure as death as sure as fate