论述了以相转移催化剂催化合成邻硝基茴香醚的新方法.The process of synthesizing o - nitroanisole by using phase - transfer catalyst was described.丁化羟基茴香醚: 一种白色蜡状的苯酚抗氧化剂, CHO, 用于保存脂肪和油, 尤指在食物中.BHa: a white, waxy phenolic antioxidant, CHO, used to p...
The children all looked up their new teacher silently,weighing him up.孩子们都默默地看着他们的新老师,揣摩他是个什么样的人。Lenny moved swiftly and silently across the front lawn.伦尼悄无声息地快速穿过房前的草坪。She silently cursed her own stupidity.她在心里默默地骂自己愚蠢。...
As a result, blood sugar plummets, sometimes even going below the baseline.结果, 血糖浓度迅速掉落, 有时甚至落于基线之下.The Very - Long - Baseline Interferometry ( VLBI ) is one of the most powerful techniques for astronomy and geodesy.甚长基线...