infrasonics的音标：infrasonics的英式发音音标为：['ɪnfrəsɒnɪks]infrasonics的美式发音音标为：['ɪnfrəsɒnɪks]...

isonicoteine的音标：isonicoteine的英式发音音标为：['aɪsnɪkətaɪn]isonicoteine的美式发音音标为：['aɪsnɪkətaɪn]...

Hypersonic wind tunnels operating at very low densities were developed starting in about 1960.低密度超音速风洞大约开始发展于1960年.It would reach hypersonic speeds -- five times the speed of sound.也就是说,要使飞机达到特超音速—即音速的五倍.FEM FCT is used ...

adj.[物]超声的，超音速的n.超声波，〈口〉超音速飞机...

supersonic的反义词有：subsonic, subsonic。adj.supersonic的反义词（超音波的;超音速的）：subsonic。supersonic的反义词（其他释义）：subsonic。...

次声学...