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 installation disk另外安装的磁盘alternate record key clause次记录键子句,更替记录关键子句Alternate immersion testing干湿交替alternate-CHOICE-clause轮流选择子句alternate winter and summer冬夏交替Alternate Mission Equipment备用任务装备alternate production method轮流生产方法alternate for a nonterminal非终结符交替alternately ablating target交替打靶alternate standard keyboard替用标准键盘