名词
中文翻译：投标有效性
同义词：
['validity of bid', 'validity ofbidding']
例句：
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1. Thebid was invalid due to a technical error.
由于技术错误，投标无效。
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2. The winning bidder must submit a detailed proposal within thenext two weeks.
获胜的投标者必须在接下来两周内提交一份详细的提案。
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3. The bidvalidity period has expired, and the contractcannot be renewed.
投标有效期已过，合同无法续签。