Benzyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,丁酸和苄醇为原料合成丁酸苄酯.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl bu...
All renascent oxygen is consumed for oxidizing metal anode to form metal oxide film.当形成足够厚的氧化膜后,阳极的氧化速度减慢,阳极表面才析出氧气.Positioning plate is usually used in fixing the place of anode and cathode plate in electrobath.定位板主要是用来...
成千上万的难民涌入拥挤不堪的城镇和村庄。Thousands of refugees are packed into over-crowded towns and villages.这片风景中只有一排村庄。The landscape is broken only by a string of villages.1766年，他以“堕落地享乐”为由将那个村庄逐出教会。In 1766 he excommunicated the village ...
采取卧位和肩痛有关.The assumption of the recumbent position is associated with shoulder pain.在滴鼻时要将婴儿抱成摇篮卧位.Hold the infant in cradle position when administering nose drops.向这边转,呈腹卧位.Turn over this way and lie on your stomach....