以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.传统的缩酮化、酯化反应工业上多采用浓硫酸作催化剂.Traditional ketalization and esterification reactions are usually catalyzed by concentrated acid in industr...
I'll sell at a discount in return for a speedy sale.为了尽快售出，我会打折销售。Eagle Star offers a 10% discount to the over-55s.鹰星公司给予年龄在55岁以上的顾客10％的折扣。In 1979, Liquor Barn thrived as a discount merchandiser.1979年，LiquorBarn烈酒折扣...
我们围坐在火边取暖。We sat round the fire to keep ourselves warm.她在人行道上跺着双脚取暖。She stamped her feet on the pavement to keep out the cold.韦德把冰凉的双手放在暖气片上取暖。Wade placed his chilled hands on the radiator and warmed them....
Such cultures could give rise to vascular tissues, roots and shoot buds.这样的培养可能产生维管组织, 根和苗端芽.Many of the cells in such cultures have somewhat sculptured walls.在这样的培养中很多细胞具有多少呈花纹状的细胞壁.Many natural fibers decay rapidly whe...
他从未表现出他前任的那种近乎傲慢的自信。He has never exhibited the self-confidence, bordering on arrogance, of his predecessor.为了报复，她砸了前任男友的家。She took revenge on her ex-boyfriend by smashing up his home.人们认为比起他的前任来，他更有实干精神。He is seen as mor...
The artillery was deployed to bear on the fort.火炮是对着那个碉堡部署的.Gaza's living by the response came swiftly. Israeli troops, tanks and helicopter, gunships would be deployed.加沙的生活所作出的反应是迅速的. 以色列军队, 坦克和直升机, 武装直升机将会展开部署......