您要查找的是不是：
- 改良PIDBetterment PID
- 改良improve
- 改良的improved
- PIDPID(proportional-integral-derivative)
- 改良剂modifying agent
- 双PIDdouble PID
- 他主张改良监狱制度。He advocates reforming the prison system.
- PID型PID-type
- 前馈PIDbudget PID
- 土壤改良soil improvement
- PID控制PID control
- 他热心于改良。He was zealous for improvement.
- PID调节PID control
- 草原改良grassland improvement
- 免疫PIDimmune PID
- 这为土壤改良工作提供了宝贵资料。This has provided valuable data for work in soil improvement.
- 死区PIDPID with dead zone
- 改良戏剧运动a movement to uplift the drama
- 遗传PIDAlgorithm PID
- 盐碱地改良reclamation of saline and alkaline land
