the long-term effects of fertilizers肥料的长远影响Crushed bones make one of the best fertilizers.骨粉是最佳肥料之一.The use of pesticides and fertilizers produces cheap grain and vegetables.使用杀虫剂和化肥生产出廉价的谷物和蔬菜....
Crushed bones make one of the best fertilizers.骨粉是最佳肥料之一.Losses of Ca and Mg are accelerated by fertilizers which supply nitrate, sulphate and chloride.在施用硝酸盐 、 硫酸盐和氯化物的情况下会加速钙和镁的损失.inorganic fertilizers无机肥料Also, the ant...
Twelve hours is the minimum, sixty hours the maximum.12小时为下限,60小时为上限.He walked two hundred and sixty miles in eight days.他在8天里走了260英里的路。I'm sixty-two. I feel sixty-two, neither more nor less.我现在62岁了，感觉自己也确实到这把年纪了。...
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...