德娜买了几卷看起来非常次的丝绸。Dena bought rolls of silk that seemed ridiculously cheap.她的丝绸连衣裙是天蓝色的，和她眼睛的颜色一样。Her silk dress was sky-blue, the colour of her eyes.丝绸和羊毛之类的纯天然织物比合成纤维的保暖性更好。Natural fabrics like silk and wool are better i...
Mineral acids have also been used in cleaning compositions as a defoamer.无机酸也被用于清洁成分作为消泡剂.The adhesive consists of dispersant, antiseptic, defoamer, crosslinking agent, liquefacient and some otheradditives.其组分包括分散剂 、 腐剂 ...