A feather falls slower than a stone only because the air holds the feather back more than it does the stone.
A feather falls slower than a stone only because the air holds the feather back more than it does the stone.
羽毛比石头落得快，只是因为空气对羽毛的阻力要比对石头的大。
A feather falls slower than a stone only because the air holds the feather back more than it does the stone.
羽毛比石头落得快，只是因为空气对羽毛的阻力要比对石头的大。