当瞳孔横向伸展的时候，更多的光能够从前面、后面和侧面进入。
When stretched horizontally, the pupils allow for more light to enter from the front, back, and sides.
而恐惧，在左侧的图片，嘴唇是横向伸展的。
While in fear - the picture on the left, the lips are stretched horizontally.
音爆的横向伸展取决于高度、速度和大气，而跟飞行器的形状、大小和重量无关。
The lateral spreading of the sonic boom depends only upon altitude, speed and the atmosphere -- and is independent of the vehicle's shape, size, and weight.
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