Annie started down the rope ladder. "Hey, come back," said Jack. But Annie kept going. "Annie, wait!" Jack called. Annie dropped to the ground. She stepped boldly up to the ancient creature.

上下文：Jack和Annie在树上的树屋中，Annie由于对地面的生物好奇，执意爬下树屋去看看。

问题：dropped to什么意思？整句话如何翻译成中文？