n.洞穴；岩穴
Currently the grotto is not accessible. 一般来说洞穴是不可进入。
We reached a beautiful grotto, whose entrance was almost hid by the vines. 我们到达了一个美丽的洞穴,洞的进口几乎被藤蔓遮掩著。
The cry proceeded from the grotto. 那声音是从地洞那面传过来的。
Here is the most eye-catching Binglingsi Grotto. 这里最引人注目的就是炳灵寺石窟。
