Grinding your heart to an iron one is far more difficult than decorating your appearance. its difference is like that between crystal and glass.
3
然而由于油饰彩画制作材料、工艺的局限以及外界各种环境因素的影响,其常会出现褪色、脱落等病害。
However, due to the limitations of materials and technology, as well as the effects of environmental factors, painting and colored drawing often occurred to fade, fall off and other diseases.