A great thing about these trees is that they are excellent for cleaning, both groundwater, and of course, air.

A great thing about these trees is that they are excellent for cleaning, both groundwater, and of course, air.

这些树的一个伟大之处在于它们非常适合清洁，包括地下水，当然还有空气。

-- Mike Lowry 迈克·罗利