【英文翻译】1. to know nothing about; to lack the slightest knowledge of; to be utterly ignorant of; to be utterly stupid; not to know one's arse from one's elbow; not to know chalk from cheese
2. it's all Greek to me
【词语解释】比喻人昏昧不明事理，或对某事完全不懂。
【字词解释】窍：心窍，洞，孔。七窍指眼、鼻孔、耳朵、嘴。
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