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...
Splays are commonly formed by currents from crevasses in levees.嗽叭形堆积通常由堤防决口的洪流所形成.The road from here splays out to the east.道路从这里开始向东倾斜.The pipe splays ( out ) at one end.管子一端呈 喇叭形....
He got another chance and didn't want to mess up again.他又获得一次机会,这次他再也不愿意把事情弄糟了.He didn't want to mess up the situation.他不想把事情弄糟.She used to mess up the floor and I had to clean up after her.她过去常常把地板弄得很脏乱，而我不得不为...