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...
Isoamyl butyrate was synthesized by using ceric sulfate as the catalyst.以硫酸高铈为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl butyrate was synthesized by using gallium sulfate supported on silica gel as the catalyst.以自制的硅胶固载硫酸镓为催化剂,正丁酸和...
风转向东边刮去。The wind veered round to the east.你在烧鱼之前得刮去鳞片.You have to scale the fish before cooking it.玛丽在把盘子放入水之前先刮去上面的食物残渣.Mary scraped the residue of food from the plates before putting them under water....
They were knocking around together for about a year.他们交往大概有一年了。Douglas was a 29-year-old journeyman fighter, erratic in his previous fights.道格拉斯29岁，是个技术不错的拳击手，在以前的比赛中发挥不太稳定。1998 was an important year for everyone: a time...
A car ran past, spotting my coat with mud.一辆汽车驶过, 给我的外衣溅上了泥点.It is spotting with rain.天在下零星小雨.You have to be good at spotting trouble on the way and heading it off.你必须善于发现潜在的麻烦并加以化解。...
把你的文件归拢放在这个文件夹内.Assemble your papers and put them in the file.他把牲畜归拢到一起.He gathered the animals together.女裁缝归拢了布料.The seamstress gathered in the cloth....