bed plane 层面 ; 层理面
movable plane bed 动平整床面
Plane grinder bed 平面磨床床身
nc plane grinder bed 数控平面磨床床身
bed d plane 层理面
At upper flow regime, the total stream power gradually deviate the effective stream power from movable plane bed to existence of sand wave.
在高能态区，从动平整床面到沙浪的出现，总水流功率又逐渐背离有效水流功率。
Cool-headed meteorologists were quick to put the story to bed: it was just an optical illusion, the cause of sunlight hitting a cloud disturbed by wind or plane traffic in just the right way.
头脑冷静的气象学家很快把这件事搁置起来：认为它只是一种光的幻觉，起因于阳光击中了一朵云彩，刚好能以一种合适的方式被风或飞机交通而使人感到不安。
The Pentagon has repeatedly said that the space plane is simply a “test bed” for other technologies.
五角大楼曾多次表示，空天飞机仅是一个技术“试验床”。
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