After that, the second reaction is a quick and direct, "I want one."
他们随后的反应可谓直截了当，“我想要一部。”
One body never exerts a force on another without the second reaction against the first.
一个物体对另一个物体施加力，从来不会不受到后者的反作用力。
One body never exerts a force on another without the second reaction against the first.
一个物体对另一个物体施加力，从来不会不受到后者的反作用力。
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