Improvei提高improvevt.改善；改进；提高vi.变得更好；改进Improve guality提高质量improve a model改进模型Improved matrix基质改良improve quality提高质量improve benefit增效improved SPIHIT改进SPIHTimproved walnuts核桃良种Improved regimen改良治疗方案improve steadily不断提高improved furnace改良炉