alternativelyadv.二者择一地；作为选择；或者alternativeadj.两者择一的；供选择的；非主流的n.二者择一；供替代的选择alternative coefficient交错系数alternative normal form析取范式alternative disjunction相间离开alternative respiration交替呼吸Alternative fuel engine代用燃料发动机alternative minimum tax[经] 可选择的低额税alternative assessments形成性评估alternative interchange互通立交alternative termination可变终止作用alternative conjunction选择连(接)词