impulse momentum method

例句：

1. 1. The suddenurge to run caught him off guard.
   突然的冲动让他措手不及。
2. 2. The car's engine has a powerful impulse.
   这辆车的引擎有强大的动力。
3. 3. The child's impulsive decision costthem dearly.
   孩子的冲动决定让他们付出了沉重的代价。