Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.One advisable way is to synthesize NFM acylating morpholine...
Building regulations have been habitually flouted.建筑法规一向都无人遵守。Because the old man was almost deaf, he habitually shouted.老头耳朵不好使, 所以一说话就大声叫嚷.They habitually gorged to the bursting point on Sunday.他们每到星期天总要大吃大喝,直到快把肚子胀破....
With that, Dean Galloway bowed his head and began praying.说着, 迪安·盖尔威低下头,开始祈祷.Marie Galloway goes to work each morning.玛丽?加洛韦每天早上去上班.Off to one side of Langdon, Dean Galloway was sitting quietly at the coffee table.在兰登身边,...
This marks the end of the cleavage stage of development.这标志着卵裂发育阶段的结束.These peaks correspond to side - chain cleavage of the ethyl and propyl groups respectively.这些峰分别相当于乙基和丙基的侧链开裂.Cellular cleavage and proliferation was...