财富积累的英文表达可以是 "accumulation of wealth" 或者 "amassment of wealth"。这个词来自英文单词 "accumulate" 和 "amass"，都有 "积累" 的意思。

下面是一些例句：

He worked hard all his pfe and finally succeeded in accumulating a large amount of wealth. 他一生都努力工作，终于成功地积累了大量的财富。
She was a savvy investor and was able to amass a fortune through smart investments. 她是一位精明的投资者，通过聪明的投资积累了一笔财富。
He inherited a large sum of money from his parents, which helped him to quickly accumulate wealth. 他从父母那里继承了一大笔钱，这帮助他快速积累了财富。