基本解釋條件致死突變型詞組短語短語conditional -lethal mutant 溫度敏感性突變株mutant conditional -lethal 條件致死性突變躰conditional lethal mutant更多詞組專業(yè)釋義生物學(xué)條件致死突變條件致死性突變株條件致死突變型條件致死突變躰