单词：reactive force
reactive force的用法和样例：
例句
- We first find the floor exerts on the passenger's feet, which is the reaction force to the force required.首先求地板作用于乘客脚上的力，该力是我们欲求力的反作用力。
- This belief acts as a counteracting force, neutralizing the automatic association mechanism.对于自动联想系统来说，这个信念就是反作用力，能中和一下。
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