Altera阿尔特拉alterv.改变；更改；阉割；切除卵巢alternation priority交互优先alternation operator替代算符alterative treatment变质疗法alternating polarity交变极性Alternatiwe splicing选择性剪接alternation activity择一活动Alternaria alternate仙客来叶斑病alternating function反对称函数altered country rock蚀变围岩alternating Y-walk[计] 交替Y通道