Explanation
解释“must”和“should”的区别
Lucy: Hey Jack! Tell me, do you know the difference between ‘must' and ‘should'?
Lucy: 嘿，Jack!你知道“must”和“should”的区别吗?
Jack: I think I do. You use these words when you suggest that somebody has to do something.
Jack: 我觉得我知道。当你暗示别人不得不做什么事情的时候，你可以用这两个词。
Lucy: That's right. You must learn the difference between these two words.
Lucy: 是，你必须学习这两个词的区别。
Jack: You used must instead of should, you could also have said ‘You should learn the difference between these two words'. Right?
Jack: 你用了“must”，没用“should”，你也可以说“你应该学习这两个词的区别”，对吗?
Lucy: That's right! But learning the difference is very important, that's why you must know it.
Lucy: 对!学习他们之间的区别也很重要，这就是为什么你必须要了解它。
Jack: So when something is very important you use must?
Jack: 就是说当什么东西非常重要的时候，你要用“must”?
Lucy: Correct! When you can't avoid doing something, or doing it is very important, then you use ‘must'.
Lucy: 对了!你不可避免得要做一些事情的时候，或要做一些重要的事情的时候，就用“must”。
Jack: And you use ‘should' when you want to recommend that something should be done, or when a person ought to do something, but it's not a strict requirement.
Jack: 当你想建议该做什么事情了，或该一个人做什么事情了，但又不是严格的要求的话，就用“should”。
Lucy: That's correct! You know the difference now. You should give yourself a treat!
Lucy: 对!你现在会区分了。你应该奖励一下自己!
Jack: I should, so it's not a requirement and I may or may not do it.
Jack: 我应该，所以这不是一个要求，我可以做，也可以不做。
Lucy: It's your choice. But we must hear some sample conversations.
Lucy: 由你决定。但我们必须听一些会话示范。
Jack: We must, so we have to. Okay, let's go!
Jack: 我们必须，所以我们不得不。好，我们走吧!
Apartment Formalities.
公寓入住手续
Lucy: What documents must I bring to sign the lease for the apartment?
Lucy: 签租房合约，我需要带哪些证件?
Manager: You must bring some identity proof for the records, and you should also bring the cash advance.
Manager: 必须要有身份证明的记录，应该预支一些现钱。
Lucy: Can I pay the advance through a check?
Lucy: 我能用支票预付吗?
Manager: Yes, you can. You can bring a check instead of cash if you want.
Manager: 行，可以。你愿意的话，也可以用支票，不用现金。
Lucy: What time should I come?
Lucy: 什么时候来?
Manager: I leave at 6 every day. So you must come before 6 PM.
Manager: 我每天六点走。你下午六点前来就行。
Lucy: Thank you. See you soon!
Lucy: 谢谢。再见!
Complaining About Late Bus Service.
抱怨迟到的公交服务
Duke: Where's the bus?
Duke: 公交车在哪儿?
Ray: I think it's running late.
Ray: 我觉得车来晚了。
Duke: It should have been here 30 minutes ago.
Duke: 早就该是30分钟前到的。
Ray: It should be coming soon.
Ray: 应该快来了。
Duke: It must, because I'm already late for work.
Duke: 必须快点来，因为我已经上班迟到了。
Solutions for the Environment.
解决环境问题的方案
Lucy: We must stop polluting Earth!
Lucy: 我们必须停止污染地球!
Duke: I agree. We are ruining this planet. We should do something about it.
Duke: 我同意，我们在毁掉这个星球。我们应该做点什么。
Lucy: I think we should use cycles instead of cars to get to places.
Lucy: 我认为我们应该使用可循环的车辆而不是汽车去别的地方。
Duke: You're right, and we should not build any nuclear reactors.
Duke: 对啊，我们不应该建核反应堆。
Lucy: You're right. Remember the Fukushima disaster in Japan? We must use renewable power like Germany.
Lucy: 你说的对。还记得日本的福岛灾难吗?我们必须像德国一样使用可再生能源。
Duke: I think we should write a letter to our senator demanding renewable energy!
Duke: 我想我们应该给我们的议员写封信要求可再生能源!