If there is no acceptance, by definition there is no contract.

按照定义，没有承诺合同便不能成立。

youdao

Acceptance of the terms of the offer results in the creation of a contract used upon service invocation.

接受了报价中的条款就会创建服务调用时所用到的合同。

youdao

Where a contract is concluded by the exchange of electronic messages, the time of arrival of the acceptance shall be governed by Paragraph 2 of Article 16 hereof.

采用数据电文形式订立合同的，承诺到达的时间适用本法第十六条第二款的规定。

youdao

However, the advent of the Internet has not changed the basic requirements of a contract, and there is no agreement where there is no acceptance, no meeting of the minds, and no manifestation of assent.

FORBES: How Zappos' User Agreement Failed In Court and Left Zappos Legally Naked