The major productive methods of serin are albuminolysis, fermentation method, chemical method and enzymic method. 其生产方法主要有蛋白质水解法 、 发酵法 、 化学法和酶法,其中酶法是现在研究丝氨酸制备的重要方法.
He died in a nursing home at the age of 87.他在一家养老院去世，享年87岁。She resolved to report the matter to the hospital's nursing manager.她决定把这件事汇报给医院的护士长。Young people and nursing mothers are exempted from charges.未成年人和哺乳期女性免予...
许多古罗马时代的引水渠至今还保留在地中海附近.Many aqueducts from ancient Roman times still stand today near the Mediterranean Sea.洛杉矶引水渠像一条蜿蜒于山底的巨蟒.The los angeles aqueduct winds like an immense snake along the base of the mountains.但太多的流出量也会...
I've been on an emotional roller-coaster since I've been here.自从我到了这里，情绪就起伏不定。It's great to go on the roller coaster five times and not be sick.坐了5次云霄飞车都没晕，真是太棒了。The last few weeks have been a real roller ...