短語詞組短語mutant t strain 突變系high virulent mutant strain 高毒力菌株Mortierella isabellina mutant strain 深黃被孢霉突變株mutant strain with deletion 缺失變異株mutant strain g 突變株gMutant strain animals 突變系動物mutant strain animal 突變系動物Resistant precursor mutant strain 耐前體變株Nsp2 mutant strain Nsp2 變異株 返回 mutant strain