Sodium ethylate was used as catalyst in Baker - Venkataraman of cyclization, and all factors were studied.环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素....
The optimum aperture of an aerator is smallest at the water depth of 4 m.一般水深在4m左右,曝气器的最优孔径最小.You know there's some debate among chiropractors about the optimum IeveI of mattress tension.你知道吗?有些神经病理学家对最佳的床褥硬度争论不休.Th...
"I absolutely hated school," Rachel says. "I skived off all the time."“我恨透了学校，”雷切尔说，“我总是逃学。”Ray was very giggly and joking all the time.蕾特别喜欢咯咯地笑，而且总是爱开玩笑。And all the time next spring's elections are drawing closer....
Sainsbury's is offering customers 1p for each shopping bag re-used.塞恩斯伯里超市为重复利用购物袋的顾客提供每只1便士的奖励。He has also copied the techniques of large businesses such as J Sainsbury.伍德罗夫还模仿了其他大公司,如塞恩斯伯里公司的营销策略....