### Chinese: 它们强度很低，球打到拍子上面，振动非常大，硬球顶不住，高手都很难驾驭。
### English: Their strength is very low, the ball hits the beat, the vibration is very high, the hard ball cannot be <v>topped</v>, and it is difficult for a master to control.

### Improved English: They are low in strength, and there will be too much vibration when the ball hits on it; it cannot withstand hard balls, and even professional cannot handle it.
