over-promising and under-delivering.啥意思
问题描述：
over-promising and under-delivering.啥意思
比如这句：I think Sony has had a history of over-promising and under-delivering.
如果是一种营销策略呢？不是变成贬义的了吗？overpromising and underdelivering 到底是什么呢？
答
没有希望,受到严重打击,低落等
I think Sony has had a history of over-promising and under-delivering
我认为索尼曾有过一段没有希望的日子（严重的低谷期）