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 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 bu...
The progresses in the synthesis study of isoamyl isovalerate at home and abroad were reviewed.综述了国内外对异戊酸异戊酯的合成研究的进展情况.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...
He managed to cling on to a ledge 40ft down the rock face...他设法紧紧地攀在了距岩壁顶端 40 英尺的岩礁上。She had to cling onto the door handle until the pain passed...她只好紧紧握住门把手，直到不疼了才松开。Wet clothes cling to the body.湿衣服贴身.She had to cling ...
Starving dogs feasted on the human corpses.饿狗贪婪地啃食着人的尸体。I feasted my friends on my birthday.我生日时宴请了我的朋友们.She feasted her eyes on the beautiful painting.她饱览了这美丽的图画....
The college has few ways to assess the quality of education overall.总体看来,这所大学评估教育质量的方法寥寥无几.Overall, barter is a very inefficient means of organizing transactions.总之，易货贸易是一种效率很低的交易形式。According to the survey, overall world...
Freezing weather in spring hampered the hens' ability to lay.春天严寒的天气降低了母鸡的产蛋能力。They are prolific breeders, with many hens laying up to six eggs.他们都是多产的饲养员，养的母鸡很多都可以下6个蛋之多。The hens darted away on all sides, raising a...
The painted murals in the Dunhuang Grottoes along the ancient Silk Road in China form the world's longest painted corridor , with a total of 45,000 square metres of painted murals.中国丝绸古道上的敦煌莫高窟内的壁画是世界最长的石窟画廊.窟内有壁画45...
这古老的农场已被划分为一块块的宅地.The old farm has been split up into house lots.在这所宅地里,宗教居于统治地位.Religion predominated in the house.能等到他讲完宅地法那章再走 吗 ?Could we just wait until he's done with the homestead act chapter?...