I should never mistake informality for insolence.是什么意思？

I should never mistake informality for insolence.

我决不会把不拘礼节错认为蛮横无礼.

should

应该，将会，可能，本应；

例句
The older child should be able to prepare a simple meal...
那个年纪稍大的孩子应当会做一顿简单的饭菜。

never

adv. 从不，从来没有，一点也不，决不，<口>不会…吧，没有，不曾；

例句
The public never had faith in his ability to handle the job...
公众从来不相信他有能力胜任这一职位。

mistake

n. 错误，过失，误解，差错，口误，笔误，失策，失误；vt.& vi. 弄错，误解；vt. 认不出，误会，看错；vi. 弄错，误解；

例句
Her mistake was to blab about their affair...
她错在说出了他们的婚外情。

informality

n. 非正式，不拘礼节；

例句
Eleanor enjoyed the relative informality of island life.
埃莉诺喜欢岛上相对轻松随意的生活。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

insolence

n. 傲慢，无礼，厚颜，傲慢的态度；

例句
It was easier to endure his insolence than his commiseration.
他的怜悯比污辱更难于接受.