Sometimes vendors overpromise in order to win a contract and then fail to deliver.

有时候，供应商为了获得合同过度承诺，但是却无法完成。

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IF THE habit of the old pre-bankruptcy General Motors was reliably to overpromise and underdeliver, “new” GM is determined to do the opposite.

如果破产前的“老”通用汽车喜欢烧香不还愿，那么“新”通用可就要下决心站到它对面了。

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Sales people overpromise and under deliver, all in the name of making their quota for the month.

FORBES: Success Will Come and Go, But Integrity is Forever

The technology generated a lot of excitement early on, in part because E Ink's founders had a tendency to overpromise.

FORBES: Magazine Article

Ironically, the overpromise in the promotion of prostate cancer screening has prolonged the uncertainties and slowed our progress in prostate cancer medicine by dissuading men from entering studies to improve screening.

CNN: Screening for prostate cancer? Patients should decide