| 单词 | sonic barrier |
| 释义 | > as lemmassonic barrier sonic barrier n. (in early use) the collective technological obstacles to attaining supersonic speed; (now) the speed of sound conceived as a physical barrier; = sound barrier n. at sound n.3 Compounds 2a. ΘΚΠ the world > physical sensation > hearing and noise > thing heard > [noun] > sound > sound barrier sound barrier1939 sonic barrier1945 1945 Cedar Rapids (Iowa) Gaz. 1 July 4/5 The sonic barrier still stands in the way. 1946 Jrnl. Royal Aeronaut. Soc. 50 445/2 I do not imagine for one moment that man will be happy until he has conquered the ‘sonic barrier’. 1955 Sci. News Let. 24 Sept. 195 (caption) By giving the aircraft a ‘wasp waist’, engineers..made it slip more smoothly through the sonic barrier. 2015 Toronto Star (Nexis) 26 Apr. a1 The sonic barrier is broken at 1,224 kilometres an hour. < as lemmas |
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