"His 6,000 inventions included the electric light bulb, the phonograph, and the mimeograph machine."
"他六千项发明,包括电灯泡,留声(唱)印。"
Before the 1970s the slide rule, or slipstick, was as common as the typewriter or the mimeograph machine.
1970年代之前，计算尺跟打字印一样，随处可见。
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Called " Dave's Rag, " they made copies on a mimeograph machine and distributed it to their friends.
他们在油印机上印刷《戴夫的布》，然后把它分发给他们的朋友。
So he changed his mind and began to sell mimeograph.
他改变了主意开始卖油印机。
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划词翻译
详细解释
六千项发明,包括电灯泡,留声
(唱)
印。"
传记
布》，然后把它分发给他们的朋友。
他改变了主意开始卖油印机。
