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...
It was a small and peaceful demonstration so I don’t know why there was such a big police presence. It was like using a sledgehammer to crack a nut.这只是个小型的和平示威，真不明白为什么有那么多警察，简直是小题大做。She picked up the sledgehammer and beg...
Smooth the mixture with the back of a soup spoon.用汤勺的背面把混合料抹平。This exercise is done in one smooth motion.这个练习一气呵成。The ride was smooth until they got into the merchant ship's wake...航行一直很顺利，直到他们碰上了商船的尾流。You have to f...
你先撤，我掩护你。You go first. I'll cover you.消防队员把客人们从燃烧着的旅馆中撤出来.The fireman evacuated the guests from the burning hotel.他受到了严厉的批评并且被撤了职.He was severely criticized and removed from his post....
五月一日是国际劳动节.The first of May is International Labour Day.是的.我们有感恩节 、 劳动节,以及愚人节.Yes, we have Thanksgiving Day, Labor Day and April Fool's Day.在中国, 我们在5月1日庆祝国际劳动节.In China, we celebrate International Labor Day on May 1...