In the wake of the plane crash, original copies of the album were recalled and replaced with a cover image of the band standing against the completely non-depressing black background.
就在空难之后，最初发行的唱片被召回并且把封面换成另一张图，乐队面对着一个毫不压抑的黑色背景。
In the experiment, a simplified aircraft model (with tail wing) is employed to construct a 4-vortex wake system consisting of a pair of tip vortices and a pair of counter rotating tail plane vortices.
试验采用简化的飞机模型(有尾翼)，建立了包含一对翼尖涡及一对反向旋转的尾翼涡(通过以负迎角安装尾翼得到)的4涡尾流系统。
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