银行账户里的存款经过多年的积累已经相当可观。

The ___accumulation of savings in the bank account has become quite substantial over the years.

窗台上的灰尘堆积已经很明显了。

The ___accumulation of dust on the windowsill is quite noticeable.

长期财富增长依赖于利润再投资的积累。

Long-term wealth growth depends on the ___accumulation of reinvested profits.