The 30′s were not less invention-intensive bringing us the jet engine, helicopter, tea bags, sticky tape, ballpoint pen and the first photocopier.

30年代人们也有不少发明，如喷气发动机、直升机、泡茶袋、胶带、圆珠笔和第一台复印机。

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Innovation in aviation has centered on the development of the jet engine for civil use, first in a turbo propeller form and later as a pure jet.

航空业的革新集中于民用航空喷气式发动机的研发，首先是涡轮螺旋桨发动机，后来是纯粹的喷气机。

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An English engineer invented the jet engine.

一位英国工程师发明了这种喷气式发动机。

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Aviation analysts say the sharp volcanic particles can damage a jet engine or cause it to shut down in mid air.

VOA: standard.2010.04.15

In boyish zeal, he rehashes the dubious British claims to have invented television and the jet engine.

ECONOMIST: The English-speaking world

Britain invented the jet engine and radar and supplied much of the heavy cognitive lifting for the computer and biotechnology industries.

FORBES: SOIL FOR THE SEED

Once the jet engine allowed mass air travel, pampering and soothing stopped and the whiff of romance became an advertising copywriter's fiction.

ECONOMIST: Flight attendants: Skivvies of the sky | The