In the summer of 1970, the SST race was three-way, with Russia's Tu-144 and the still-on-the-drawing-boards Boeing 2707-300 joining the legendary Concorde.

1970年夏天，有三路兵马征战超音速运输机领域，俄罗斯的图-144、仍然在设计阶段的波音2707-300以及协和超音速客机。

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The Tupolev Tu-144 is a Soviet supersonic airliner, developed in the 1960s.

镇馆之宝——图波列夫tu - 144，苏联产超音速客机，研发于1960年代。

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In 1968, Russia's TU-144 supersonic airliner made its first flight, several months ahead of the Anglo-French Concorde, which it closely resembled.

CNN: Tuesday,