我并不为卡尔感到难过。他了解实情，他知道他必须做什么，但又没能做成。
I don't feel sorry for Carl. He knew the score, he knew what he had to do and couldn't do it.
为了学习他的系统，人们必须首先知道如何书写字母表中的字母，并学习它们的发音。
To learn his system, people must first know how to write letters of the alphabet and learn which sounds they represent.
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.
我知道你们的自行车在这里名声不错，但是你们必须在非洲树立声誉并进行销售。
I know your bikes have a very good reputation here, but you have to build up a reputation and market it in Africa.
我知道我必须依靠这些食物了。
如果你想以最佳方式到达目的地，你必须知道你要去哪里。
You have to know where you're going if you are to plan the best way of getting there.
我知道你必须阅读图书馆的预约书籍，而且这有时间限制。
I know that you have to read reserve books in the library and that you have time limits.
为了知道你的命运，你必须了解你的才能和决定怎样去使用它们。
In order to know your destiny, you have to know your talents and decide how to use them.
你必须知道建造游泳池是很昂贵的，而且通常需要几年的时间来完成。
You must know that pools are expensive to build, and they usually take several years to complete.
他知道彼得的命令必须服从，所以他很快就回来了，戴着约翰的帽子，神情很严肃。
He knew Peter must be obeyed, and he returned in a moment, wearing John's hat and looking solemn.
如果你想搜索图书馆藏书，却不知道作者的名字、书名或文章的确切名称，你必须设置关键字查询。
If you want to search the library holdings and don't know the author's name or the exact title of the book or an article, you have to set up a keyword search.
你必须知道这些元音都应该加在哪，这使得学习如何阅读变得更加困难。
You have to know where the vowels are supposed to go, and that makes it harder to learn how to read.
其中一人被随机挑选出来，提出双方都知道的一笔钱应该如何分配；只允许有一个报价，必须被接受或拒绝，没有谈判。
One is randomly chosen to propose how a sum of money, known to both, should be shared between them; only one offer, which must be accepted or rejected without negotiation, is allowed.
当你必须用英语说某事时，先问问自己“我知道什么英语单词和短语在这种情况下可以用上？”
When you have to say something in English, think first and ask yourself" What words and phrases do I know in English that I can use in this situation?"
计算机专家必须学会不告诉人们有关计算机的知识，而且要能够解释人们真正想知道的问题的答案。
The computer experts have to learn not to tell people about computers, but have to be able to explain the answers to the questions that people really want to know.
双方都不想放弃这个岛，但他们知道必须做点什么。
Neither side wanted to give up the island, but they knew they had to do something.
我们必须知道卡尔什么时候来，这样我们才能给他订个房间。
We must find out when Karl is coming, so we can book a room for him.
在新的城市和小镇，由于其空间的限制，那里的居民必须要知道确切的时间且安排好时间，以组织集体活动和分配空间。
The new cities and towns, squeezed by their walls, had to know and order time in order to organize collective activity and ration space.
如果你询问美国的女大学生，就会知道她们对另一半的期望包含了天底下的一切：除了忠诚之外，伴侣还必须风趣，还要是个朋友。
If you ask American college women, they expect everything under the sun: in addition to being committed, partners have to be amusing, funny and a friend.
如果你知道你必须给团队提供反馈，你就会更有动力。
It motivates you more if you know that you've got to provide feedback to a group.
如果有些愿望还没有实现，我们必须对他表示信任，因为他知道得最清楚。
If some wish remains unfulfilled we must show our confidence in Him, for he knows best.
机器人必须有一种特定的方式来接收程序，这样它才知道自己要做什么。
The robot will have to have a certain way to receive the program so that it knows what it is to do.
如果你必须从互联网上购买，要确保该网站是你所知道和信任的药店网站。
If you must buy from the Internet, ensure that the website is that of a pharmacy you know and trust.
作为一名职业律师，他必须知道，更重要的是，他必须用双脚实践，在黑暗中，在雨中，在小巷里追着他想要谈话的人跑。
He has to know as a professional lawyer, and what is more, he has to apply it on his feet, in the dark and rain, running down an alley after someone he wants to talk to.
他知道他必须面对所有的困难。
他们必须知道并遵守安全规则。
我知道我必须收下，否则他可能永远不会离开。
要保存一件物品，必须知道它是如何制作的。
One must know how one object was made in order to preserve it.
舞台经理知道他必须尽快做点什么来挽回尴尬的局面。
The stage manager knew he had to do something quickly save the embarrassing situation.
他知道他必须买一双新的。但他不想买错鞋子。
He knew he had to buy a new pair. But he didn't want to buy the wrong shoes.
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