artificial satellites and rockets． 论文总结了电子计算机、人造卫星和火箭三方面的新成就。 ·The principal functions that may be performed by vacuum tubes are rectification．amplifi...
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The article summed up the new achievements made in electronic computers ,artificial satellites and rockets .
本文总结了电子计算机、人造卫星和火箭这三方面的新成就。（增加概括词）
The thesis summed up the new achievements made in electronic computers, artificial satellites and rockets.
该论文总结了电子计算机、人造卫星和火箭三方面的新成就。
The article summed up the new achievements made in electronic computers artificial satellites and rockets.
本文总结了电子计算机、人造卫星和火箭这三方面的新成就。
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