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 block转替部件
alternate scour交替冲刷
alternate works预备工事
alternate paper备用稿
alternate timer更替定时器
alternate joint交错接缝,错缝,错列接头,错缝接合
alternate field轮耕地
alternate sweep交替扫描
alternate entry交替进入, 交替输入
alternate cover交替掩护