accumulation
/əˌkjuːmjʊˈleɪʃən/noun
mass noun
1- the acquisition or gradual gathering of something积累, 积聚; 堆积：
the accumulation of wealth.
财富的积累。
1.1
- count noun a mass or quantity of something that has gradually gathered or been acquired积聚物; 堆积物：
the accumulation of paperwork on her desk.
堆积于她书桌上的文书工作。
1.2
- the growth of a sum of money by the regular addition of interest（由定期利息带来的）资本增益。