Soon layer of oceanic ooze began to accumulate above the old hard layer.

很快，海洋软泥层开始在原先的硬地层上面堆积起来。

youdao

Soon layer of oceanic ooze began to accumulate above the old hard layer.

很快，海洋软泥层开始在原先的硬地层上面堆积起来。

youdao