alterm和项
alterv.改变;更改;阉割;切除卵巢
alternant rolling交替轧制
alter the balance改变平衡
alternation policy可供选择的方针政策
alternating matrix交错矩阵
alternating layers互层
alternating method交错法
Alternaria hederaen.常春藤链格孢
alternation theory替代学说
altering direction换向
Alternaria dianthin.石竹链格孢