1. The constant criticism from his boss demoralised him and he began to doubt his own abilities.
经常来自老板的批评使他失去了士气，开始怀疑自己的能力。
2. The team's loss in the final demoralised the players and they struggled to regain their confidence.
在决赛中的失利使队员们失去了士气，他们努力恢复自信。