second impact的用法和样例：
例句
- I redid the test this morning and improved the score, so the impact seems to have a good effect.
今早我重新做了这个检查，总分提高了，所以看来这次碰撞结果并不坏。
second impact的相关资料：
临近单词
second man
second
second-order Euler's equation
second probability distribution
second-order Markov-proeess
second- handed housing market
second-class commercial paper
second timestart an undertaking
second harmonic AC polarography
second-class piston manometer
Second-grade college students
second-order cone programming
