短语词组用作名词 (n.)动词+～give sb a caution 给某人一个警告形容词+～necessary caution 必要的谨慎用作动词 (v.)～+名词caution the prisoner 警告那个囚犯～+介词caution about sth 就某事警告caution about the speed 注意车速caution against doing sth 警告(某人)不要做某事caution against the danger 谨防危险短语 返回 cautioned