reaction force

• 反作用力

reaction force的用法和样例：

例句

1. For every action there's an equal and opposite reaction.
   每一个作用力都会引起相等的和相反的反作用力。
2. 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。