The system of contract with pending validity, the law endows the interrelated third party with the right of acceptance and endows the counterpart with the right of admission and withdrawing.

在效力待定合同制度中，法律赋予相关第三人以承认权，赋予相对人以催告权和撤回权。承认只能向合同的相对人行使。

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Contract with pending validity refers to the pending state of both the validity or invalidity of contract, and it needs a third party who has the right of formation to subsequently endorse or refuse.

合同的效力待定是指其有效或无效处于不确定状态，尚待享有形成权的第三人以追认或拒绝的意思表示来确定的合同。

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