Objective To explore the biological exposure indices ( BEI ) of dimethylformamide ( DMF ) in China.目的探讨我国二甲基甲酰胺 ( DMF ) 的生物接触限值 ( BEI ).Methods Reforming the Hodge method in synthetizing DMF.参照hodge法并作,改良合成1-脱氧-1-吗啉果糖(DM...
The foxes come and scavenge the bones.狐狸过来寻觅骨头。Older drivers are more likely to be seriously injured because of the fragility of their bones.老司机由于骨骼脆化更有可能受重伤。Ask the butcher for soup bones (marrow bones are best).跟肉铺老板要煲...
Use separate chopping boards for raw meats, cooked meats, vegetables and salads.切生肉、熟肉、蔬菜和拌色拉的青菜时要使用不同的切菜板。Salad fork: salads, fish, pies, pastries, and cold meats.沙拉餐叉: 吃沙拉 、 鱼肉 、 馅饼 、 点心以及冷盘时用.The salads taste too vine...