Unless they succeed,the yield gains of the Green Revolution will be largely lost even if the genes in legumes that equip those plants to enter into a symbiosis with nitrogen fixers are identified and isolated,and even if the transfer of those gene complexes,once they are found, becomes possible. (4)
解释:主句比较简单,而后面跟着的由and连接的两个表示让步的条件状语从句就相对复杂,第一个从句是用一个修饰主语的定语从句that equip those plants to enter into a symbiosis with nitrogen fixers把主谓隔开;第二个从句则运用了插入语once they are found把主谓隔开。
训练:Unless they succeed,the yield gains of the Green Revolution will be largely lost even if the genes in legumes that equip those plants to enter into a symbiosis with nitrogen fixers are identified and isolated,and even if the transfer of those gene complexes,once they are found, becomes possible.