小孩必须学会吃饭时的规矩。
酒店检查员巡查时必须隐瞒真实身份。
客人离开俱乐部时，你必须为他们签退。
你离开大楼时必须交还通行证。
你打电话时必须留下自己的完整姓名及用于联络的详细资料。
You must leave your full name and contact details when you phone.
首先，这些武器应当只在遭受核袭击后反击时才使用。其次，这些武器的拥有必须是一种临时的应急手段。
First, the weapons should be intended for use only in retaliation after a nuclear attack. Second, the possession of the weapons must be a temporary expedient.
发生火灾时，我们必须给消防员打电话。
当我们援引总是建议谨慎行事的预防原则时，我们必须做出权衡。
While we invoke the precautionary principle, which always recommends erring on the side of caution, we have to recognize there will be trade-offs to be made.
此外，在哥伦比亚，英语国家的人必须知道用手势表示身高时，必须考虑他指的是人还是动物，分别用不同的手势。
Again, in Colombia, a speaker of English would have to know that when he indicates height he must choose between different gestures depending on whether he is referring to a human being or an animal.
当红灯亮时，车辆必须停下来。
红灯亮时，你必须在交通灯前停下。
发表观点时必须谨慎，因为语言会伤害别人。
We must express our opinions with caution because words can hurt.
我们必须调查为什么她和她丈夫在一起时不开心。
We have to investigate why she was not happy with her husband.
有航班时，你必须迅速登机，而且你不能离得太远。
When there is a flight, you have to be quick to get on it, and you can't be too far away.
我们在实施这些规则时必须保持一致。
必须在乘飞机之前24小时再次确认你的航班。
You have to reconfirm your flight 24 hours before travelling.
记住，当运输车辆到达时，你必须能够用现金或保付支票支付费用。
Remember that when the carrier arrives, you must be able to pay the charges with cash or a certified cheque.
如果你必须涵盖美国史的12个章节，首先计划3次2小时的复习，每次4章。
If you have to cover 12 chapters in American history, begin by planning on three two-hour reviews with four chapters per session.
走上坡时你必须用力蹬车。
考试时你必须保持沉默。
当我问他我是否必须离开时，他说我不能离开。
如果你在幽默时感到尴尬，你必须练习让它变得更自然。
If you feel awkward being humorous, you must practice so that it becomes more natural.
打网球时，在球第二次弹起之前你必须击中它。
灭火时消防员们必须互相依靠。
在判断智力和智慧时，我们必须分解出某些知识。
In judging both intelligence and wisdom, we have to factor out some knowledge.
为什么彼得必须在42小时内完成他的旅行？
“当你必须独自走进被毁坏的房间时，感到毛骨悚然是很自然的。”他说。
"It's natural to feel creepy," he says, "when you have to make trips by yourself into the destroyed rooms."
在试图解释罗马现象时，人们必须着重强调这种对领土势力的本能。
In trying to explain the Roman phenomenon, one would have to place great emphasis on this almost instinct for the territorial imperative.
当你开始承担经济责任、租金、税收时，你必须记录你支付的频率。
When you start having financial obligations, rents, taxes, you have to keep track of how often you pay.
当我要求你停止向同学献殷勤时，你必须停止。
When I ask you to stop paying attention to your classmates, you must stop.
应用推荐