The rise of anti-happy art almost exactly tracks the emergence of mass media, and with it, a commercial culture in which happiness is not just an idea but an ideology.
反快乐艺术的兴起与大众传媒的出现几乎是同步的，与之相伴的是一种商业文化，在这种文化中，快乐不仅仅是一种主张，而是一种意识形态。
The vertical impact between tracks and support rollers is one of the most important factors in evaluation of the noise and anti-fracture capacity of the track.
履带装甲车辆的履带与托带轮的垂向冲击是产生冲击噪音和导致履带疲劳与断裂的重要因素。
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