He went into the dark cave by himself. 他独自一人走进了漆黑的山洞。
The boys huddled together in the cave to keep warm.
男孩子们在山洞里挤成一团取暖。
We kindled a firebrand in the cave .
我们在山洞里点燃火把。
Perhaps you have seen colorful limestone cave and underground river, but the eighteen caves here are Mesozoic lava land forms, which is produced by the movement, cracking and weathering of the earth's