contrary to common belief -----这是插入语,可以省略,这样以来,Imagination grows by exercise 与 is more powerful in the mature than in the young就成了 一个主语 + 两个谓语：imagination grows - - -AND is -...
既然是插入语， 可以省略的， 那为什么还要加入这句话呢？
能给我举个同样的例子吗。 谢谢
插入语的存在指起强调作用，但不能左右句子的意思：it was raining heavily and , what was worse, her car broke down on the way.
