genetically improved strain of tree改良: improve; ameliorate樹(shù)種: varieties of trees seeds of ...合理改良樹(shù)種: properly improved strain of tree改良樹(shù)脂: modified resin良樹(shù): yoshiki下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
