improvements改进
improvementn.改进;改善
Improvement of PCR system体系优化
Improvement of properties性能改善
improvement of experiment实验改进
improvement in the market市况好转
improvement of VAT system税制完善
improvement of foundation基础加固
improvement of lift-law升力法的改进
Improvement in technology技术革新
improvement and protection改善和保护
improvement of key project重点治理