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.
他能一面快速地吃饭，一面言辞强硬地说话，给同他一起就餐的人留下了很好的印象。His ability to talk tough while eating fast made a favourable impression on his dining companions.我十分强硬地向那些人宣称北约需要转变方向。I brashly announced to the group that NATO needed to be turned ...
宾州煤的蕴藏量为三百五十亿吨.Pennsylvania sits on 35 billion tons of coal.一茶匙中子星上的物质重达十亿吨.One teaspoonful of material from a neutron star would weigh a billion tonnes....
He sat down and sugared and stirred his coffee.他坐下来，在咖啡中加糖并搅拌。They sugared trees to catch moths.他们在树上撒糖捕蛾.The roads had been cleaned of snow, but the roof tops , grass and trees were still sugared white.道路上已无积雪, 但屋顶 、 草地...
degenerative diseases such as arthritis诸如关节炎之类的变性病Parkinson s disease ( PD ) is a degenerative disorder characterized by a loss of midbrain dopamine ( DA ) neurons.帕金森病 ( PD ) 是一种以中脑多巴胺神经元丢失为特征的 中枢神经 系统退行性疾病....degenerat...