accrete|accreted|accretes|accreting

随着时间的推移，灰尘和碎屑逐渐堆积成了一个小土堆。

Over time, dust and debris slowly ___accreted into a small mound.

随着时间的推移，灰尘在窗台上逐渐堆积。

Over time, dust ___accretes on the windowsill.

珊瑚礁是通过微小珊瑚虫不断附着生长而形成的。

The coral reef is ___accreting as tiny polyps keep attaching to it.