动词

1. You must do as you are told.
你必须遵嘱行事。

2. You mustn't talk like that.
你可不能这样说话。

3. You must be tired after your long journey.
你走了这么远的路，一定很累。

4. You must not do it.
你不可以做那件事。

打错电话

A：Hello. Is Susan there?
喂，是苏珊吗？

B：Who?
谁啊？

A：Li Ming.
李明。

B：You must have the wrong number.
你一定打错电话了。

A：Oh, I'm sorry.
噢，对不起。

用餐

A：Is this my meal?
这是我的菜吗？

B：What did you order?
您点了什么？

A：The fried scallops.
炸干贝。

B：Oh, sorry. There must be some mistake.
哦，抱歉，一定是弄错了。

A：Would you get me some more water, please?
麻烦你再帮我加点水，行吗？

B：OK.
好的。

道别

A：Well, I must be off now. I have an appointment at six.
嗯，我现在得离开了。我六点有个约会。

B：In that case, I won’t keep you any longer. Drop in any time.
如果是那样的话，我不再挽留你了。（欢迎）随时到我这里来。

A：OK. Goodbye.
我会的。再见。

B：See you later.
再见。

1. 一定要：应该(SHOULD)给与客户端正收到一个空的消息正文,此时一定不能(MUSTNOT)给任何接受方发送任何消息.(
6) .对不能识别的命令一定不能(MUSTNOT)缓存.(
7) .当本地的TCP输入缓冲区为空时,一定要(MUST)立即发送所有待发的

2. must：malnutrition universal screening tool; 营养不良普遍筛选工具

noun

1. the quality of smelling or tasting old or stale or mouldy

Synonym: mustinessmoldiness

2. grape juice before or during fermentation

3. a necessary or essential thing

e.g. seat belts are an absolute must