The theory of ground-effect vehicles goes back to the 1920s, when Carl Wieselsberger, a German physicist, described how the ground effect works.
关于地效飞行器的原理可以追溯到20世纪20年代——当德国物理学家卡尔*威尔斯贝格描述出地效原理的特点时。
The effect of the back-ground noise is effectively rejected due to the bispectral technology.
由于采用了双谱技术，脑电背景噪声的影响得到有效的抑制。
Through repeated tests, we found that the back ground music Love and Happy has a good effect.
经我们反复试验发现：由百余首世界经典名曲剪辑而成的《爱和乐》作阅览室的背景音乐效果很好。
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