n.摩擦音
The question of spirant and the development are also recommanded, and then the improved method is discussed. 针对橡胶轴承存在的鸣音问题,介绍了改进研究的进展,提出改进方法。
groove spirant 沟擦音
blade spirant 舌叶(摩)擦音
n.怀抱大志者；野心家
adj.有抱负的；有野心的
n.止汗药
止汗药
