常見(jiàn)例句雙語(yǔ)例句This impervious layer or boundary will retard the free diffusion of moisture. This condition is referred to as case hardening.這一不透氣的殼層(或邊界層)會(huì)阻滯水分自由擴(kuò)散，這種情 形稱爲(wèi)表麪硬化。 返回 diffusion impervious layer