硕大的火漆封蜡上盖着温思罗普的纹章.The broad seal was impressed with Winthrop's coat of arms.他用印盖在火漆上.He impressed a seal on wax.我在熔软的火漆上盖了章.I impressed my seal on the melted wax....
以焦油苊为原料,研制萘酰亚胺型荧光 增白剂.Naphthoylimine Fluorescent Whitening Agent ( FWA ) can be made from tar - acenaphthene.目的: 了解泰安市面粉中增白剂的添加情况.Objective : To understand the brightening agent adding condition of flour in Taian.去污力强, 对...