In Western（西方的） countries, animals have different meanings（不同的意义）. When you pass a test, someone says "a lucky dog" to you. It means you are lucky. When you study, someone wants to play with you and puts water on your desk. You can say "You're a black sheep"to him or her. It means（意味着） you don't like him or her to disturb（打扰） you. You just want to study. When you're in trouble（麻烦）, but no one helps you. You can say "You're a cold fish". It means he or she isn't helpful. When you join in a running game, you want your friend to shout "Come on" for you. But he or she only plays there. You can say "You're a white elephant. "
