For centuries, the body's blood has been connected closely with the feelings. People who show no human emotions or feelings are said to be cold-blooded.

Cold can affect other parts of the body. But the expression ―get cold feet has nothing to do with cold or your feet. The expression means being afraid to do something you have decided to do. For example, you agree to be CEO of a company. But then you learn that all the other officers have resigned (辞职), and all the work of the company will be your responsibility (责任). You are likely to get cold feet about being CEO when you understand the situation.

    The expression “give someone the cold shoulder” probably comes from the physical act of turning your back toward someone, instead of speaking to him face to face. You may give the cold shoulder to a friend who has not kept a promise (遵守诺言) he made to you, or to someone who has lied about you to others.

    “A cold fish” is not a fish. It is a person. But it is a person who is unfriendly, unemotional and shows no love or warmth. A cold fish does not offer much of himself to anyone. Someone who is a cold fish could be cold-hearted. He or she will never feel sorry for those in bad situation.

    “Out in the cold” means not getting something that everybody else got. A person might say that everybody but him got a pay raise—he was left out in the cold. And it is not a pleasant place to be.

    The best way of learning a language is using it. The best way of learning English is talking in English as much as possible. Sometimes you'll get your words mixed up and people won't understand you. Sometimes people will say things too quickly and you couldn't understand them. But if you sense of humor, you can always have a good laugh at the mistakes. It's better for people to laugh at your mistakes than to be angry with you, because they don't understand what you are saying. The most important thing for learning English is:“ Don't be afraid of making mistakes because everyone makes mistakes.”

    Job interviews can be very different from country. An interviewer's “body language” and questions, and the form of an interview are not the same around the world.

    If you're at a job interview in Japan, don't look directly into the eyes of the interviewer. It is considered impolite. But if you're at an interview in the US, you should make eye contact(交流) with the interviewer. If you don't, the interviewer may think you are not sure about your ability.

    In the US and some other countries, interviewers aren't supposed to ask questions about family and personal information. In most countries, however, personal questions are very common during job interviews.

    In Germany, your interview might begin with a very short conversation followed by a formal(正式的) interview. In Mexico and many other countries, the whole interview might not be formal.

    "How are you?" is a nice question. It's a friendly way that people in the United States greet each other. But "How are you?" is also a very unusual question. It's a question that often doesn't have an answer. The person who asks "How are you?" hopes to hear the answer "Fine.", even if the person's friend isn't fine. The reason is that" How are you? "isn't really a question and "Fine." isn't really an answer. They are simply other ways of saying "Hello" or "Hi".

    Sometimes, people also don't say exactly what they mean. For example, when someone asks "Do you agree?", the other person might be thinking, "No, I disagree. I think you're wrong." But it isn't very polite to disagree so strongly, so the other person might say "I'm not so sure. "It's a nicer way to say that you don't agree with someone.

    People also don't say exactly what they are thinking when they finish talking with other people. For example, many talks over the phone finish when one person says "I have to go now." Often, the person who wants to hang up gives an excuse, "Someone's at the door." "Something is burning on the stove." The excuse might be real, or it might not. Perhaps the person who wants to hang up simply doesn't want to talk any more, but it isn't polite to say that. The excuse is more polite, and it doesn't hurt the other person.

    Whether they are greeting each other, talking about an idea, or finishing a talk, people often don't say exactly that they are thinking. It's an important way that people try to be nice to each other, and it's a part of the game of language.