In other words, the vertical component of its linear momentum remains zero, since there is no resultant vertical force.
换句话说，因为没有竖直方向的合力，所以线动量的竖直方向仍为零。
The frame, which is formed by buttress, breast wall and side wall bear the horizontal loads, and group pile cap bears the resultant force of vertical and horizontal loads.
由扶壁、耳墙、胸墙组成的框架抵抗水平荷载，而以承台、桩基抵抗垂直及水平荷载的共同作用力。
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