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 determinant交错行列式alternate beneficiary备选受益人alternate arrangement交互配置alternate contraction交替收缩alternated subcarrier交替副载波alternate ring method交替循环法Alternate Master Unit备用主件alternate index entry辅助索引表目alternate distributor双触点配电器alternate row seeding隔行播种