410. It would certainly be preferable to learn many lessons from friends and family, but it is human nature to need to learn through personal experience in order to be entirely convinced.
如果能从家人和朋友身上吸取经验教训，当然最好不过；然而，唯有从亲身经历中获得的经验教训，我们才会完全相信，这也是人之常情。

六级词汇讲解:

可用于议论文或说明文的中间段落。该句可提炼出句型It would certainly be preferable to..s.，but it is human nature to...第一句中的it would be preferable to do sth.是虚拟语气句，表明一种可能性。but后面的分句中的it is human nature to do sth.意思是“做某事是人之常情”。

句型拓展:

It would be better for you not to stay up too late.
你最好别熬夜到太晚。
He would have preferred that deaf children be taught at hearing schools.
他更愿意聋哑儿童在聋哑学校接受教育。
It would certainly be preferable to have a situation where the market was operating normally.
拥有一个市场运行正常的局面当然最好不过了。