溫故知新 [温－－－]

Jyutping wan1 gu3 zi1 san1
Pinyin wēn gù zhī xīn

Definitions (CC-CEDICT)
  1. to review the old and know the new (idiom, from the Analects)
  2. to recall the past to understand the future
Definitions (Wiktionary)
  1. phrase, idiomatic
    reviewing learnt knowledge helps one understand it better; reviewing the past helps one understand the present
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）