accumulation

1. N-COUNT An accumulation of something is a large number of things that have been collected together or acquired over a period of time. 积累

...an accumulation of experience and knowledge. …经验和知识的一种积累。

2. N-UNCOUNT Accumulation is the collecting together of things over a period of time. 积累

...the accumulation of capital and the distribution of income. …资金的积累和收入的分配。