合力为零的话。
The direction of the acceleration is the direction of the net force.
加速度的方向与合力的方向相同。
If ever I do not want to eat, do net force me I know well when I need to and when not.
当我不想吃东西时，不要勉强我，我清楚地知道该什么时候进食。
Sensuality is only one force pushing the Net toward intelligence.
官能性只是驱动网络智能化的一种力量。
Knowledge economy, knowledge industry, net economy and information industry form the cultural productive force.
知识经济、知识产业、网络经济、信息产业是文化生产力的外在形态。
A high percentage of balls fail to fly over net or are without force.
不是球过不了网，就是软而无力。
A high percentage of balls fail to fly over net or are without force.
不是球过不了网，就是软而无力。
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