Lead can accumulate in the body until toxic levels are reached.铅会在体内积聚直至造成铅中毒。We let the mending accumulate until Wednesday.我们让需缝补的衣服一直积存到星期三.It was his ambition to accumulate a million dollars before he turned thirty.他立...
阐述了饲料脱氟磷酸三钙的作用及发展必要性、内外生产技术现状.The action and development necessity of the feed defluorinated tricalcium phosphate were expounded.介绍了湿法磷酸化学法脱氟的脱氟机理和影响脱氟率的多种因素.The mechanisms and some affect factors for chemical disposal d...