"His 6,000 inventions included the electric light bulb, the phonograph, and the mimeograph machine."
"他作出了六千项发明,包括电灯泡,留声
(唱)和油印。"
"His 6,000 inventions included the electric light bulb, the phonograph, and the mimeograph machine."
"他作出了六千项发明,包括电灯泡,留声(唱)和油印。"
Before the 1970s the slide rule, or slipstick, was as common as the typewriter or the mimeograph machine.
1970
之前，计算尺跟打字和油印
样，随处可见。
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