一些传统的起泡液体像甘油，食物染料，和小心、巧妙的摄影技术可以充分表现一些最显著的流体力学特性。
Some old-fashioned bubble liquid, glycerin, food dye, and careful photography can shed light on some of the most striking fluid dyamics.
他们在流体力学，电子，隐身技术工程方面的研究速度及广度足不足以有能力赶上世界水平？
Are they learning fast enough and broadly enough, in terms of engineering and technology like fluid dynamics, electronics, stealth to be able to keep up with the state of the art?
双谱、相干分析是流体力学研究中一个有效的、可或缺的技术手段。
It is proposed that bispectrum and bicoherence is an effective and necessary tool in nonlinear fluid mechanics .
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