You're defending yourself against the horrible parts of yourself and some of these make a little bit of sense.

你通过抵制不适当的原始欲望来保护自己,其中有些防御机制是很有意义的。

耶鲁公开课 - 心理学导论课程节选

His shield, in addition to being a defensive thing, is also potentially an offensive weapon.

他的盾牌,除了能提供防御和保护之外,同样也是一个潜在的有力武器

耶鲁公开课 - 古希腊历史简介课程节选