替代途径 meaning in English

alternate pathway
alternative pathway

These suggest that the hemolytic activities displayed by amphioxus humoral fluid appear to represent the vertebrate complement system probably operating via the alternative pathway ( ap )
这些结果说明：文昌鱼体液中存在着类似于脊椎动物替代途径补体样的溶血活性。
Transplantation offers the only effective treatment for the severest forms of hf , which affect about six per cent of patients , but the shortage of donor hearts has led to a search for alternatives
心脏移植对最严重的心力衰竭患者提供了唯一的有效治疗措施，而这些最严重的心力衰竭只占病人总数的6 % ，但是器官来源的缺乏导致必须寻找替代途径。