Rough surface is easy to generate V shape of stress concentration, which reduce fracture strength.

粗糙表面的晶粒间易产生V形口，导致应力集中，降低了膜的断裂强度。

youdao

Fruit surface is smooth, small and tidy, sweet and succulent, flavor concentration, sugar content 18%.

果面光滑，大小整齐，肉质甜脆，香味浓，含糖量18%。

youdao

Fruit surface is smooth, small and tidy, sweet and succulent, flavor concentration, sugar content 18%.

果面光滑，大小整齐，肉质甜脆，香味浓，含糖量18%。

youdao