petards的中文翻譯是什麼意思

PHRASE害人反害己；自食其果

If someone who has planned to harm someone else is hoist with their own petard or hoist by their own petard, their plan in fact results in harm to themselves.

• The students were hoist by their own petards, however, as Granada decided to transmit the programme anyway.

  不過，學生們聰明反被聰明誤，格拉納達最終還是決定要轉播這個節目。