It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime. 由二苯并-1,3-二氧杂 - 环辛烷 -2- 羧酸经两步反应制得, 总收率70%.
Success is not final, failure is not fatal: it is the courage to continue that counts.--Winston Churchill成功不是终点，失败也并非末日，最重要的是继续前进的勇气。In 1945, Winston Churchill was defeated at the polls.温斯顿·丘吉尔在1945年的大选中被击败。"Some people ...
利息按月支付。提款须提前3个月通知银行。Interest is paid monthly. Three months' notice is required for withdrawals.所有飞往兰州的航班都已取消，何时恢复另行通知。All flights to Lanchow had been cancelled until further notice.我来给旅馆打电话，通知他们我们明天入住。I'll ring...
acrobatics on the high wire走钢丝杂技Acrobatics is hard to learn but beautiful to watch.杂技不好学,但很好看.We watched a performance which included a puppet show and acrobatics.我们观看了一场演出,内容有木偶和杂技....