失去信心

• lose heart

例句

1. 万勿对人类失去信心：要想到美国国内那些从未以卑鄙的手法欺骗过你的人啊。
   Do not lose faith in humanity: think of all the people in the united state who have never play you a single nasty trick.
2. 他失败了许多次，但他并没有失去信心。
   He fail many times, but he do not lose heart.