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....
琼非常迷信，认为绿色会带来厄运。Jean was extremely superstitious and believed the colour green brought bad luck.她给家庭带来了厄运。She had brought ill luck into her family.他们并不知道即将降临到他们头上的厄运。They were unaware of the fate that was to befall them....
Both boys had good manners, politely shaking hands.这两个男孩都很有礼貌，友好地握了手。His behaviour offends against the canons of good manners.他的行为违背了礼法的准则.Mother attaches a great deal of value to good manners.妈妈很重视礼貌....
Investigators say nearly $100,000 was wired into the suspect's bank accounts.调查人员说有近10万美元汇入了嫌疑人的银行账户。The investigators complained about the difficulties of squeezing information out of residents.调查人员抱怨说很难从居民身上获取信息。S...