Don't be disheartened by a single failure.
别因一次失败就气馁。
The peasants were dismally disheartened by the long drought.
久旱使农民忧郁沮丧。
英汉双解词典包含483723条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。