The preparation of catalysts , yield of glyceryl triacetate and and demerits the catalysts were introduced briefly.对上述催化剂制备、三醋酸甘油酯收率、催化剂优缺点作简要介绍.This paper analyzes the glyceryl polyether by nuclear magnetic resonance ( ...
I had tuberculosis and was told I'd be in the sanatorium for two years.我得了肺结核，被告知要在疗养院呆两年。She is now at Lu - shan sanatorium and endeavouring to pull round.她目前在庐山休养所,力图把身体养好.I had TB and spent several months in a sa...