行为人非依法律规定或者取得对方同意，不得擅自变更或者解除。

The actor shall not alter or rescind his act except in accordance with the law or with the other party's consent.

youdao

当事人应当按照约定履行自己的义务，不得擅自变更或者解除合同。

The contracting parties shall perform their respective obligations in accordance with the terms of the contract and may not arbitrarily alter or rescind the contract.

youdao

当事人应当履行合同约定的义务，任何人不得擅自变更或者解除合同。

The parties shall perform their obligations stipulated in the contract. No party shall unilaterally modify or rescind the contract.

youdao