反复的失败会削弱一个人的自尊心。

Repeated failures can ___undermine a person's self-esteem.

不断的批评可能会打击团队的士气。

Constant criticism may ___undermine the team's morale.

泄露机密信息可能会严重危害国家安全。

Leaking confidential information could seriously ___undermine national security.