短語(yǔ)詞組短語(yǔ)cross -breeding improvement 雜交改良cross choose breeding 雜交選育soybean cross -breeding 大豆雜交育種binary cross -breeding 二元雜交sugarcane cross -breeding 甘蔗雜交育種cross s breeding flax 雜交亞麻 返回 cross breeding