gradualadj.逐渐的;逐步的;平缓的
gradual erosion逐渐地腐蚀
gradual filling逐级填充
gradual massing逐渐的集中
gradual cooling逐渐冷却,分段冷却
gradual cutting渐伐
gradual advance渐升
gradual surgery渐进手术
gradual decrease逐渐下降
gradual changing渐变
Gradual progress渐进性国际化