know which end is up

动词 v.
中文释义

英文释义

动词 v.
  1. To possess sound judgment or common sense; to have a clear understanding of a situation. idiomatic
    — He was too stoned to know which end was up.

词形变化

knows which end is up present,singular,third-person knowing which end is up participle,present knew which end is up past known which end is up participle,past

词源

From the common marking this end up on parcels to guide proper transport.
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