Taivo A Taiwan Mandarin dictionary

金科玉律

jīnkēyùlǜ

ㄐㄧㄣ ㄎㄜ ㄩˋ ㄌㄩˋ

  1. 1golden rule
  2. 2key principle

Keep 金科玉律 and it comes back until you know it.

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