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....
It's going to be some time before the troop recovers its strength.这支部队要过一段时期才能恢复实力.More often than not the patient recovers.病人多半能恢复健康.He has to take ( ie swallow ) six pills a day until he recovers.他每天要服六粒药丸直到痊愈....
上面有厚厚一层泡沫的一杯啤酒a glass of beer with a good head of foam上面有厚厚一层泡沫的一杯啤酒a glass of beer with thick froth on top台伯河已不再是漫溢平原的泛起泡沫的急流.The river Tiber was no longer a foaming torrent overflowing the plains....