To map 100 mutants by this method would necessitate nearly 5,000 crosses.用这种方法来绘制100个突变型的遗传图就要做5000个杂交.The agglomeration and sintering of fine particles can necessitate a lowering in temperature of operation.由于微粒易于聚集和烧结,...
The occurrence of peptic ulcer in some pa - tients with hiatal hernia may necessitate considerationof both diagnosis.对一些裂孔病患者,出现消化性溃疡时,须考虑两种疾患的诊断.The agglomeration and sintering of fine particles can necessitate a loweri...