所以，尽管人口激增，土地供应却没法保持同速。
So though the population has soared, the supply of land has not.
这样做的目的是为了在地球自转的同时，使卫星能够绕地球同速转动。
The idea is that the craft circles ourplanet at the same speed as Earth’s rotation about its axis.
火焰面紧跟在激波前缘的后面，二者同速传播，超压峰值的位置与火焰面重合。
Flame front closely follows Shockwaves at the same speed, and location of peak overpressure is coincident with flame front.
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