Hello. Hello there. Are you ready for lunch with your grandpa?
哈喽 。哈喽 。 准备好跟你的祖父一起吃午饭吗?
Doubt is the key of knowledge.
怀疑乃知识的钥匙。
In this part of the cave, they could hear an insistent booming sound which they found was caused by a small waterspout shooting down into a pool from the roof of the cave.