by heart

介词短语
/baɪ ˈhɑːt/    /baɪ ˈhɑɹt/

英文释义

介词短语
  1. From unaided memory and in full detail.
    — to learn something by heart

词形变化

off by heart alternative

词源

From Middle English by herte. Compare French par cœur (literally “by heart”), of which the English may be a calque.
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