1972年手机从提出想法到做出模型只用了90天，多亏了库珀在摩托罗拉的工程师间赞助的一场设计竞赛，许多其它部门的工程师也参与其中。
From idea to prototype took 90 days in 1972 as Mr Cooper sponsored a design contest among Motorola engineers-many from divisions he did not run.
1972年手机从提出想法到做出模型只用了90天，多亏了库珀在摩托罗拉的工程师间赞助的一场设计竞赛，许多其它部门的工程师也参与其中。
From idea to prototype took 90 days in 1972 as Mr Cooper sponsored a design contest among Motorola engineers-many from divisions he did not run.
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