NMA was hydrogenated to 3 - amino - 4 - methoxyacetanilide ( AMA ) with S - Ni as catalystin liquid phase.以改性的骨架镍为催化剂催化3-硝基-4-甲氧基乙酰苯胺(NMA)液相选择性加氢制备了 3- 氨基 -4- 甲氧基乙酰苯胺 ( AMA ).Isoprene could be deeply hydrogenated to isop...
The Dragon Boat Festival is one of three major Chinese holidays, along with the Spring and Moon Festivals.端午节是三个中国主要节日之一，另两个是春节和中秋节。AT length , the Dragon - boat Festival came and went in an atmosphere of unrest.旧历端阳节终于在...
当我们用 he 时, 我们泛指男女.When we use " he " , we generalize for both sex.“ 江湖 ” 过去泛指四方各地.The term " rivers and lakes " in old days meant in general all corners of the country.现时则泛指任何滑面, 优质的纸板.Now, generally refer to good qualit...
He said if I bought the whole kit and caboodle, I could have it for peanuts.他说如果我全部买下, 只需花很少的钱.The cost was peanuts compared to a new kitchen...与建新厨房相比，那笔费用微不足道。The soil is adaptable to the growth of peanuts.这土壤适宜于花生的生长....
在海边过了一天,他被晒黑了.He is sunburned from a day on the beach.带上防晒油,以免被晒黑了.Take your suntan lotion with you so that you won't get burnt.黑色素使皮肤变黑是人被晒黑的原因.Melanin darkens the skin and is the cause of suntan....