那个……的老故事可以很好地证明……
点睛本句型是典型的引用故事或者名言以增加表达效果和说服力的句型。在本句中，serve as意为“用做”。illustration意为“例证；实例”。如：
It affords, says Morgan, a "good illustration of the operation of the principle of natural selection". 按照摩根的看法，这可以作为“自然选择原则发生作用的最好例证”。
句型拓展The old saying "Spare the rod, spoil the child" was taken as a motto by some parents. 有些家长信奉“孩子不打不成器”这句老话。
The story handed down was a good illustration of the patience required to deal with the problem. 流传下来的小故事充分说明了处理这个问题是很需要耐心的。
