Sweaters, "sweaters," are like very warm shirts - shirts that keep you warm. 毛衣（sweaters），就像一件暖和的衬衫，可以保暖。

　　Often, you put a shirt on and then if you are cold you put a sweater on top of your shirt. 通常，你穿上一件衬衫，然后如果觉得你冷了，你就在衬衫外再穿一件毛衣。

　　Lucy says, "no one dares to show up in t-shirts and shorts." 露西说:“不过没人敢穿T恤和短裤去上班。”

　　The expression to dare, "dare," to do something means that no one attempts to do that. “敢于”（dare）这个表达，敢做某事，意味着没有人试图那样做。

　　The verb, to dare to, means that it is something that you shouldn't do or it is something that is risky, you could get in trouble. 动词敢于，意味着它是你不应该做的，或者它是有风险的，你可能会遇到麻烦。

　　Your mother may say, "Don't you dare go to the movies tonight," 你妈妈可能会说:“你今晚不能去看电影，”

　　she would mean you better not - you are not allowed to go to the movie, if you do, you will be in big trouble - you will have a lot of problems from me. 她的意思是你最好不要，不许去看电影，如果你去看电影，你会遇到大麻烦，你会遇到很多问题。