As blind as a bat 有眼無珠

as blind as a bat這個(gè)短語的字面意思是“像蝙蝠一樣看不見”的一個(gè)引申。蝙蝠眼睛看不見，它需要靠超聲波判別方向，從而完成捕食和飛行等一系列活動(dòng)。所以，“as blind as a bat”常用來表示某人“判斷力差”、“有眼無珠”。

【例句】
Our boss is as blind as a bat. All those obvious drawbacks have escaped him.
我們老板真是有眼無珠，連那些明顯的弊病都視而不見。
 

Without her help, he will act as blind as a bat.

她只要不幫他，他的判斷力就會(huì)很差。