if you would not be fortten as soon as you are daad and rott

这句确实是出自富兰克林.全句是：If you would not be forgotten, as soon as you are dead and rotten, either write things worth reading, or do things worth the writing.

它的意思是：“如果不想在死後烂了便马上被人遗忘,便应写些值得阅读的东西,或干些值得别人去写的事.”