Thorpe next set out to determine exactly when the chaffinch learns to sing.接着,索普就开始研究苍头燕雀是在什么时候学唱歌的.The chaffinch has three or four songs and produces them in a specific order.苍头燕雀合唱三、四种歌,唱的时候按着一定的先后次序....
来吧，比尔。给汤姆寄张卡片让他高兴高兴吧。Come on, Bill. Send Tom a card and make his day.“这听起来是极为令人生畏的艰苦工作。”西比尔后来说。"It sounds the most fearful hard work," Sybil said later.林肯公园的广告插图出自比尔·霍夫斯塔特之手。The artwork for the LP was done by Bill Hofsta...
In fermentation, dextrose is changed to alcohol ( C 2 H 5 HO ) and carbon dioxide ( CO 2 ).发酵过程中, 葡萄糖变成洒精 ( C2H5HO ) 和二氧化碳 ( CO2 ).Objectives: to study fermentation conditions of chymosin from mutant strain Mucor pusillu...