英 [mʌst; məst] 美 [mʌst; məst]
aux. （表示必要或很重要）必须；（用于表示肯定推测）一定，谅必；（提出建议）应该；（用于表示意图）一定要，坚持要；（用于表示同情）必定；（用于问句中表示生气）非要 ；（用于感叹句，表示惊讶或震惊）一定是
n. <非正式>必不可少的事物；（发酵前或发酵中的）葡萄汁；潮气，霉菌；（尤指发情期的公象、雄骆驼等的）狂暴状态（=musth）
【名】 （Must）（美）穆斯特（人名）
复数musts
must /məst, mʌst/ CET4 TEM4
情态动词 You use must to indicate that you think it is very important or necessary for something to happen. You use must not or mustn't to indicate that you think it is very important or necessary for something not to happen. 必须 (表示重要或必要)
What you wear should be stylish and clean, and must definitely fit well.
你的穿着应该时尚整洁，而且必须非常合体。
You are going to have to take a certain amount of criticism, but you must cope with it.
你会受到一定程度的批评，但这是你必须面对的。
情态动词 You use must to indicate that it is necessary for something to happen, usually because of a rule or law. 必要 (表示依据法律或规则)
Candidates must satisfy the general conditions for admission.
应试者必须满足录取的一般条件。
Mr. Allen must pay Mr. Farnham's legal costs.
艾伦先生必须支付法纳姆先生的诉讼费用。
情态动词 You use must to indicate that you are fairly sure that something is the case. 肯定 (表示猜测)
At 29 Russell must be one of the youngest ever international referees.
29岁的拉塞尔想必是迄今为止最年轻的国际裁判之一。
Claire's car wasn't there, so she must have gone to her mother's.
克莱尔的汽车不在那儿，想必她是去她母亲家了。
情态动词 You use must, or must have with a past participle, to indicate that you believe that something is the case, because of the available evidence. 必定 (表示有据推断)
"You must be Emma," said the visitor.
“你一定是埃玛,”来访者说道。
Miss Holloway had a weak heart. She must have had a heart attack.
霍洛韦小姐心脏衰弱。她一定得过心脏病。
情态动词 If you say that one thing must have happened in order for something else to happen, you mean that it is necessary for the first thing to have happened before the second thing can happen. 肯定已经发生 (表示前者为后者的前提)
In order to take that job, you must have left another job.
为了去做那份工作，你肯定已经辞去了另一份工。
情态动词 You use must to express your intention to do something. 一定要 (表示意愿)
I must be getting back.
我该回去了。
I must telephone my parents.
我一定要给父母打个电话。
情态动词 You use must to make suggestions or invitations very forcefully. 务必; 一定得 (提出建议或邀请)
You must see a doctor, Frederick.
弗雷德里克，你一定得看医生。
情态动词 You use must in remarks and comments where you are expressing sympathy. 想必 (表示同情)
This must be a very difficult job for you.
这对你来说肯定是一项非常艰巨的任务。
情态动词 You use must in conversation in expressions such as "I must say" and "I must admit" in order to emphasize a point that you are making. 必须 (用于表示强调)
This came as a surprise, I must say.
我得说这发生得很突然。
I must admit I like looking feminine.
我得承认我喜欢看上去娇柔些。
情态动词 You use must in expressions such as "it must be noted" and "it must be remembered" in order to draw the reader's or listener's attention to what you are about to say. 一定 (用于引起注意)
It must be noted, however, that not all British and American officers carried out orders.
然而，一定要注意，并非所有英美军官都执行命令。
情态动词 You use must in questions to express your anger or irritation about something that someone has done, usually because you do not understand their behaviour. 偏要 (用于问句中，表示因不理解某人的行为而愤怒)
Why must she interrupt?
她为什么偏要打断呢？
情态动词 You use must in exclamations to express surprise or shock. 一定 (用于感叹句，表示惊奇或震惊)
"Go! Please go."—"You must be joking!"
“走吧！请走吧。”—“你一定是在开玩笑！”
I really must be quite mad!
我真的一定是气坏了！
可数名词 If you refer to something as a must, you mean that it is absolutely necessary. 必不可少的事物; 必须要做的事
Taking out travel insurance may seem an unnecessary expense, but it is a must.
旅游保险费用看起来似乎是没必要的，但却是必不可少的开支。
不可数名词 the newly pressed juice of grapes or other fruit ready for fermentation (待发酵)葡萄汁; 果汁
不可数名词 mustiness or mould 霉臭; 霉菌
习语 You say "if you must" when you know that you cannot stop someone doing something that you think is wrong or stupid. 如果你一定要 (表示虽不赞同但无法阻止)
If you must be in the sunlight, use the strongest sunscreen you can get.
如果你一定要呆在阳光下的话，就用你能买到的最有效的防晒霜。
习语 You say "if you must know" when you tell someone something that you did not want them to know and you want to suggest that you think they were wrong to ask you about it. 如果你一定要知道的话
It scared the hell out of her, if you must know. And me, too.
这把她的魂都吓飞了，如果你一定要知道的话。而且我也被吓坏了。
必须-引用次数：2880
So users must be able to determine the validity of a certificate.
因此用户必须能验证证书。
参考来源基于PKI的证书撤销方式
多目的使用者导向软体技术
...你想成为乘务员，你就可以报考四川铁路学校的这个专业(Specialty)，只要你是一个初中毕业生你就可以去当乘务员，但是你必须(must)是女性，如果你形象好，身材高挑那你入选的机会就更大了。
2、要请求手续费补贴的会员，请务必(Must)于2小时外向客服QQ建议请求，不读书的人，不光变的浅薄，也将被社会前进的步伐所抛弃。
must 在口语中表猜测 work out 想明白，弄清楚，解决问题；（gym）拼命锤炼 ..
而想要完整地保留82场常规赛以及圣诞大战，那么新赛季就必须要(Must)在12月前保证开打。而为了实现这一点，劳资双方也只有抓紧这剩下不多的时间，争取在下周之前就对新协议达成意向上的一致。
All income must be declared.
所有收益必须申报。
Why must she interrupt?
她为什么偏要打断呢？
She must have misheard.
她一定是听错了。
Those chosen must come from poor families and must also face at least one barrier to getting a job.
VOA : special.2009.08.20
He says, "Poetry in our own time-- -- such is the complexity of the world we live in-- must be difficult."
他写道，“我们这一时代的诗-,正如我们生活着的世界-,让人费解“
文学理论导论课程节选 : 耶鲁公开课
Oh really? I imagine that it must be very difficult to drive in a big city like New York.
是吗？在大城市开车肯定会比较困难，比如在纽约。
SpeakingMax英语口语达人 : Do you ever实战
We must not be enemies. Though emotion may have damaged them, it must not break our ties of love."
VOA : special.2009.07.30
But one of the men defending the town believed that the battle against the forces of slavery must continue.
VOA : special.2009.05.07
No one has counted but so many tell stories that it must be thousands and thousands.
That would at least give the industry certainty about what it must buy and when.
It is noted that the completed application must reach UNESCO before 30 April of each year.