carte blanche /ˈkɑrtˈblɑnʃ, ˈblɑnʧ/
署名空白紙,(任人填寫條件等),全權委託
Carte blanche A blank paper, with a person's signature, etc., at the bottom, given to another person, with permission to superscribe what conditions he pleases. Hence: Unconditional terms; unlimited authority.
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carte blanche
n : complete freedom or authority to act