People are often nervous or apprehensive before performing in front of an audience.在观众面前表演之前，人们常常紧张或忧虑。
People who are really nervous may feel tense, which is the opposite of relaxed.真正紧张的人可能会感到紧张，这与放松相反。
Sometimes, taking a deep breath can help a nervous person feel more relaxed.有时，深呼吸可以帮助紧张的人感到更放松。
When someone is nervous their muscles often tense up and their heart rate increases.当有人紧张时，他们的肌肉往往会紧张，心率也会加快。
Someone who strongly believes in their ability to do something is often confident.坚信自己有能力做某件事的人往往很自信。
The best way to build confidence is to practice what you are going to do until you can do it with ease.建立自信的最好方法是实践你将要做的事情，直到你能轻松地做到。
Someone with confidence can perform at a higher level than someone who is nervous.自信的人比紧张的人表现得更高。
The key to building confidence and reducing nervousness is effective and frequent practice.建立信心和减少紧张的关键是有效和频繁的练习。
To be indifferent means to not care one way or the other about something.漠不关心意味着不关心某件事。
If you are indifferent to a person or a project, it means that the person or project isn't important to you.如果你对一个人或一个项目漠不关心，这意味着这个人或项目对你来说并不重要。
People who are indifferent may not value anything or anyone but themselves.漠不关心的人可能不重视任何东西或任何人，除了他们自己。
To be appreciative is to be thankful or grateful for something.感恩就是对某物的感恩或感激。
If someone does something nice for you, you should appreciate it.如果有人为你做了好事，你应该感激。
It's important to show your appreciation for someone's support or help.对某人的支持或帮助表示感谢很重要。
If someone does a favor for you, you should show your appreciation by thanking them.如果有人帮了你一个忙，你应该感谢他们以示感谢。
To be depressed is the opposite of to be happy.沮丧是快乐的对立面。
When someone is depressed, they feel very sad.当某人情绪低落时，他们会感到很难过。
When people are depressed, they are usually pessimistic about the future.当人们情绪低落时，他们通常对未来感到悲观。
Depression can be caused by disappointing news or by failing to reach a goal.抑郁可能是由令人失望的消息或未能达到目标造成的。
Someone who has practiced a lot and believes in his or her ability is? -confident 一个经常练习并且相信自己能力的人是？-自信
When you are really sad, you may be depressed.