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zuān jiān yǎng gāo ㄗㄨㄢ ㄐㄧㄢ ㄧㄤˇ ㄍㄠ

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Từ điển Trung-Anh

(1) lit. looking up to it, it gets higher; boring into it, it gets harder (idiom) (from Analects)
(2) fig. to delve deeply into one's studies
(3) meticulous and diligent study

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