There are practical as well as aesthetic reasons for planting trees.种树既实用又美观，可谓举两得。Her work will include planting trees and caring for animals.她的工作包括种树和照料动物。These animals thrive on the leaves of certain trees.这些动物靠吃某几种树的叶子而茁壮生长。One geoengineering project is tree planting.地球工程学的项目之一是种树。