一经签署
Upon signing
以上为机器翻译结果，长、整句建议使用 人工翻译 。
这项合同一经签署即开始生效。
The contract will go into effect as soon as it is signed.
youdao
合同一经签署，就应依照法律实施。
Once entered into, a contract will be enforceable by law.
本协议一经签署，即具法律效力并同意受其约束；
the agreement, when concluded, constitutes legal obligations that are binding and enforceable;
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