We are in one of the most severe recessions in modern times.我们正在经历现代最严重的一段经济衰退。They used to buy ten kilos of beef in one lump.他们过去常买10公斤重的整块牛肉。Many children are now born into or raised in one-parent families.现在很多孩子在单亲家庭中...
The artificial sweetener sorbitol has a laxative effect.人工甜味剂山梨糖醇有通便作用。The best mass ratio of sorbitol to coconut oil is 1∶5.山梨醇与椰子油的最佳质量比为1∶5.Objective : To explore the relation between specific rotation and purity of s...