lost cause Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++lost cause → lost cause at lost2(7) something that has no chance of succeedinglost cause lost causeBrE /ˌlɒst ˈkɔːz/ 🔊NAmE /ˌlɔːst ˈkɔːz/ 🔊, /ˌlɑːst ˈkɔːz/ 🔊 nounsomething that has failed or that cannot succeed 业已失败的事情；没有希望的事情