Thus only the metabolizable portions of a feedstuff can provide energy and essential nutrients.因此,只有饲料的可代谢部分可提供能量和必需的养分.Flours contain very small amounts of sugars which are metabolizable by yeast.面粉中一般都含有少量的糖,它们是酵母的代谢产生...
I have endeavoured to give in their briefest outline the reasons for my disaffection.我已经尽力简短地说明了我产生不满情绪的原因.Heaven only aided those who endeavoured to help themselves.老天爷只帮助那些自力更生的人.He endeavoured to extricate the car, di...