If there is an abrupt change of direction in their energy, from vertical to horizontal, such as when they accelerate across the court, bouncing the ball, there is a real danger of personal injury.

如果有垂直于地平线的力量突然改变方向，例如当他们快速地穿过球场，跳起来拿球，这对个人的伤害是很严重的。

youdao

The merger appears to have been helped along by an abrupt change of direction in NYSE seat prices as well as the abrupt change in thinking by its participants.

FORBES