alternaterows隔行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 Acquisition RADAR备用目标捕捉雷达alternate route trunk group替代路径干线群alternate lane construction隔仓施工法alternate communication net备用通信网Alternate Command Authority备用指挥机构alternate nasal obstruction交替性鼻阻塞alternate operating columns轮换操作塔alternate current signaling交流信号方式Alternate Interim Successor备份临时接替者alternate routing indicator迂回路由标志