impervious抗渗: impervious的: 4次方是 The fourth power of 2 i ...抗渗: [水文] impervious◇抗渗试验 impermeability test; 抗渗性 anti-permeability抗渗碳: impervious carbon抗渗性: impermeability; resistance to water penetration下载手机词典可随时随地查词查翻译