书蠹
Simplified
书蠹
Traditional
書蠹
Pinyin
shū dù
Definition
bookworm (literal and figurative); book louse; pedant
他真是个书蠹，喜欢指点别人
Tā zhēnshi gè shū dù, xǐhuan zhǐdiǎn biérén
He's such a bookworm, he likes to correct others
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