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English definition of “promise sb the earth/moon”

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promise sb the earth/moon

informal
to say that you will do much greater things than you will ever be able to achieve: Like most governments in their first term of office, they promised the earth.
Translations of “promise sb the earth/moon”
in Chinese (Traditional) 向(某人)作無法兌現的承諾…
in Chinese (Simplified) 向(某人)作无法兑现的承诺…
(Definition of promise sb the earth/moon from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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