Severe disappointment or set-back 基本例句 极大的失望; 挫折 She concealed her disappointment from her mother.她对母亲隐瞒了自己的失望。 He tried to mask his disappointment with a smile.他试图以微笑来掩饰他的失望。 She crowed over his disappointment.她因他受了挫折而幸灾乐祸。 All their efforts at reform have been set back.他们所有的改革努力都遭受到挫折。