nano-grain的用法和樣例：
例句
- The effects of grain size on the tribological properties of nanocrystalline Ni were investigated.
考察了晶粒尺寸對納米晶鎳材料摩擦磨損性能的影響。 - The effect of calcining temperature on the thermal stability and grain distribution was investigated by means of XRD, TEM, BET and TG-DTA measurements.
實(shí)驗證明，對不同溫度處理后的復合納米晶表現出良好的熱穩定性。
