translation.en: So take a simple example, with r equals five percent and g equals one percent, wealth holders only need to reinvest one fifth of their capital income to ensure that their wealth rises as fast as the size of the economy.
translation.zh: 举个简单的例子， r为5%，g为1%， 财富持有者只需要再投资 资产中的五分之一 就可以保证他们的财富 可以和经济等速增长。