alternate SC交替的副载波alternatev.交替；轮流adj.间隔的；轮流的；交替的n.代替者；供替代的选择alternate instruction交替指令alternate environment交互环境alternate iron losses交变损耗alternate emplacement预备掩体alternate growth form交互生长形式alternate permutation交错排列alternately associate交叉联想alternate path method拆除构件法alternate day therapy隔日疗法alternate flight plan备份飞行计划