"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
(
)和油
。"
,
版刷件,版刷品版刷刷,油"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()和油。"
Before the 1970s the slide rule, or slipstick, was as common as the typewriter or the mimeograph machine.
1970年代之前，计算尺跟打字和油一样，随处可见。
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