A large proportion of the fluorine is vaporized during the concentration process.在浓缩过程中大部份氟蒸出.The fluorine does not accumulate indefinitely in the water.氟不会在水里无限制地积累.If the fluorine content is high, it may increase plant...
我们能感觉出丝绸的光滑质地.We could feel the smooth texture of silk.丝绸的价格看涨.Silk is on the advance.她的连衣裙是蓝丝绸的，分量很轻，领口开得非常漂亮。Her dress was of blue silk, quite light, and becomingly open at the neck....