But of course, that's only on the rare occurrences when it does rain. Trees are an essential part of the water cycle.

当然，只有下雨的时候才会出现这种情况。树是水循环中重要的一部分。

Close by, there were about five rain trees, three of them really large ones.

附近大约有五棵雨树， 其中三棵非常大。