The stream of oval stone, the millennium and water flushing, stony slip inversion, natural harmony, in a nonporous stone, also can arrive.
溪边椭圆形之石，本因千年冲洗而成，水顺石滑反转活动，自然调和，曲尽其妙，也非多孔之石所能到达的。
2
When you see a TV detective turn a doorknob using a handkerchief, she's probably destroying a latent print. The only way not to corrupt a latent print on a non-porous surface is to not touch it.
当你在电视剧集中看到一个侦探使用手帕打开一个门把手时，他可能正在毁坏潜在的指纹。
3
Powder (for non-porous surfaces) : Metallic silver powder or velvet black powder.