问题描述：
cutting edge 在这句中啥意思?
This growth has been driven by a revolution in microelectronics in the early 1960s,putting more than one transistor on a piece of semiconductor was considered cutting edge.
This growth has been driven by a revolution in microelectronics in the early 1960s,putting more than one transistor on a piece of semiconductor was considered cutting edge.
问题解答：
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