双语常用典故： As false as Cressida 负心如克瑞西达;抛弃爱人

典出自莎士比亚的《特洛伊罗斯与克瑞西达》(Troilus and Cressida)，里面女主人公对男主人公说“...as false as air, as water, wind, or sandy earth… ”

Cressida, a Trojan woman whose father has defected to the Greeks, pledges her love to Troilus, one of King Priam's sons. However, when her father demands her presence in the Greek camp, she quickly switches her affections to Diomedes, the Greek soldier who is sent to escort（护送） her.

克瑞西达，一个特洛伊妇女，她开始时回报特洛伊罗斯对她的爱，但后来又因为代奥米迪斯而背弃了他。