名词
中文翻译：Unknown
同义词：
['1. bid', 'offer', 'tender', 'proposal']
例句：
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1. The company needs a bid-proof to ensure the quality of the work.
公司需要一份投标证明来确保工作的质量。
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2. The winning bidder must provide a proof of their qualifications.
获胜的投标者必须提供他们的资格证明。
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3. The government issued a guarantee for the project's success.
政府为该项目的成功提供了担保。