Look at the picture and guess the idiom, a toilet, a skin, and a word

一知不通 [ yī qiào bù tōng ] Interpretation of knots: hole, refers to the heart of the trick. None of them are connected. I don't understand the metaphor at all.

Source: Yuan Zhang Guobao "Luo Lilang made a big fuss in Xiangguo Temple": "Ah; This dad doesn't know anything. ”

synonyms: illiterate, ignorant, unaccomplished.

Antonyms: Know-it-all, all-knowing, easy, open-mouthed, expert, all-open, all-in-one, all-in-one, all-knowing, all-knowing, perceptive, all-knowing, all-knowing, all-knowing, all-knowing, all-knowing, all-knowing, all-knowing, all-knowing, all-knowing, all-