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两个物体的相互作用力总是大小相等,方向相反,同时出现或消失且作用于同一直线上。
The irrationality of the rational is the rationality of the irrational.
The past is a foreign country; they do things differently there.
我很高兴活着,我很高兴成为我自己。
Natural gas will play a crucial role as a bridge fuel in the transition to a lower-carbon future.