must Just as I was busiest, he must come bothering me. 正在我最忙的时候,他偏要来打搅! must have been [done] 1. 〔必然〕(She must have been a beauty in her day. 她年轻时一定是个美人。 What a sight it must have been! 一定很好看呢! How you must have hated me! 你一定把我恨死了。〔间接叙述法〕 I said he must have lost his way. 我说他一定是迷了路了)。 2. 〔must = should 或 would surely〕 (You must have caught the train if you had hurried. 你要是快一点就一定赶上火车了)。 3. 〔必须〕 (Applicants must have finished the middle school. 报名者必须中学毕业)。 n. 〔口语〕必须做的事,不可不做的事;必需的东西。 This order is a must. 这个命令必须执行。 adj. 〔口语〕绝对需要的,不能缺少的。 must legislation 不可缺少的立法。 a must item 重要项目。 a must book 必读书。 a must subject 必修科目。 n. (发酵前或发酵中的)葡萄汁;新葡萄酒。 n. (象等在交配期中的)狂暴状态;交配期的象。 adj. (特指象因性欲冲动而)狂暴的。 must4 n. 1.霉臭;霉。 2.麝香。
must be 表示有根据的肯定推测; 可能是; 来表达“推测”语气; 时态不一致; 是由情态动词加; 一定是; 只是对客观现实的推测
However , it must be realized that there is an uneven development betvveen the present design theory and the practice , that concrete - filled tube . as a new type of composite building material , has not been yet adopted in bridge design codes , and also , that there no railway concrete - filled steel tubular arch bridges at present 然而,必须看到,现有的桥梁设计理论滞后于钢管混凝土拱桥的发展,钢管混凝土,作为一种复合材料,还没有被列入设计规范之中,更应该看到,铁路上还没有一座钢管混凝土拱桥建成。