In a new book, German journalist Andreas Bernard studied the origins of elevator.

德国记者安德烈亚斯·伯纳德在他的新书中研究了电梯的起源。

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The guest book tickets to confirm the one-way guide for attractions tickets, followed the guide line up waiting for the elevator go upstairs (tour guide not upstairs).

客人以订票确认单向导游换取景点门票，跟随导游排队等候电梯上楼（导游不上楼）。

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Read the sales book for Cisco Unified Communications, complete with elevator pitches.

FORBES: Search Google For Company And Government Secrets

Eric, Tom Eisenmann at Harvard and myself are working on an article to briefly describe Lean Startups and Eric is publishing a book on Lean Startups but let me give you the elevator version.

FORBES: The Mystery of Repeatable Innovation and the Startup Lessons Learned Conference