altern交错群落alterv.改变；更改；阉割；切除卵巢Alternaria acid交链孢菌酸alternating pad变压垫Alternaria malin.苹果链格孢alternaric acid间链孢霉酸alternating run交变路段Alternaria mall链格孢苹果专化型alternaria spot交链孢斑病alternating sum交错总和,交错和alter statement更改语句alter the style改变风格, 式样