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电梯演讲又叫“300秒电梯理论”,它来源于麦肯锡公司一次沉痛的教训。麦肯锡公司曾为一家重要的大客户做咨
Elevator speech, also known as “300 seconds elevator theory”, it comes from McKinsey company a painful lesson. McKinsey & Company has consulted with an important big client