Equip Plants Enter Symbiosis Nitrogen Yield Gains Green

意群训练： Unless they succeed , the yield gains o f 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 i f the transfer o f those gene complexes , once they are found , becomes possible .

标志： 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/.

译文： 除非他们（指基因生物学家）成功，否则/即使（使得豆科植物与固氮菌形成共生关系的）基因 能够被找到和分离出来 ，而且 即使基因综合体 在被发现之后 的转基因 成为可能 ，/绿色革命所带来的产量上的获得将很大程度上被丧失掉。

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；第二个从句则动用了插入语once they are found 把主谓隔开。