flag day

名词 n.
中文释义

英文释义

名词 n.
  1. A day on which a registered charity raises money, usually by selling small lapel flags. Ireland,UK
  2. A day on which a registered charity raises money, usually by selling small stickers. Hong-Kong
  3. A day designated for changing to an incompatible system.
  4. A change which is neither forward nor backward compatible.

词形变化

flag days plural
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