Polyacrylonitrile is insoluble in acrylonitrile.聚丙烯腈不溶于丙烯腈.Water, acrylonitrile and the galactomannan gum are added to a reactor with an alkali metal hydroxide.水 、 丙烯晴和半乳甘露聚糖胶,同碱金属氢氧化物在一起,加入到反应器中.Objective: To observe th...
a street of bedraggled tenements.两旁是破旧公寓的街道Here were crumbling tenements, squalid courtyards and stinking alleys.随处可见破烂的住房 、 肮脏的庭院和臭气熏天的小胡同.A two - family house has two tenements.一座两家合住的房屋含有两所住宅.The tenements are in a po...
The equation is simple: research breeds new products.情况很简单:研究产生新产品。Violence breeds violence.暴力会催生更多暴力。Such secrecy breeds and encourages fear and suspicion.如此保密的做法滋生并加剧了人们的恐惧和疑虑。...