When an end is lawful and obligatory,the indispensable means to is are also lawful and obligatory .(Abraham Lincoln ,Ame
问题描述：
When an end is lawful and obligatory,the indispensable means to is are also lawful and obligatory .(Abraham Lincoln ,American statesman)
如果一个目的是正当而必须做的,则达到这个目的的必要手段也是正当而必须采取的.(美国政治家 林肯.A.)
后半句怎么理解?尤其是is和are?
答
is 应该是it吧?是不是看错了?