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 Net Control Officer备用网控制军官Alternate-furrow irrigation隔沟交替灌溉alternate substitute material代用材料alternate system input source交替系统输入源程序Alternate furrow-irrigation隔沟交替灌溉alternate beating and cooling交替加热及冷却Alternate Space Defense Center预备空间防御中心alternate freezing and thawing交替冻融,冻融交替Alternate Space Defense Agency预备空间防御局Alternate Joint Command Center备用联合指挥中心