bake something blind

bake a pastry or flan case without a filling

（糕饼）未加馅心先行烘烤地

(as) blind as a bat

(informal)having very bad eyesight

(非正式)视力极差的，几乎看不见的

blind drunk

(informal)extremely drunk

(非正式)烂醉如泥的

there's none so blind as those who will not see

(proverb)there's no point trying to reason with someone who does not want to listen to reason

(谚)和不讲理的人说理——白搭；无眼不算瞎，有眼不看是真瞎

turn a blind eye

pretend not to notice

装作没有看见，视而不见

when the blind lead the blind, both shall fall int

(proverb)those people without knowledge or experience should not try to guide or advise others in a similar position

(谚)"瞎子带瞎子，两个掉沟里"（喻没有相关知识或经验就不要指导别人或给别人提建议）

I didn't know anything about fighting and neither did my students—it was the blind leading the blind.

我对搏斗一无所知，我的学生们也是——这是瞎子带瞎子。