Gradually, they carved out Mount Rushmore.

渐渐地，他们凿出了拉什莫尔山。

We sometimes give the name of a mountain by using the word " mount" (mount) in front of it, such as Mount Rushmore, Mount Hood, Mount Washington.

我们有时会在山的前面加上“mount”（山）来命名山，例如Mount Rushmore、Mount Hood、Mount Washington。