compulsory tree-planting植树义务
obligatory tree-planting义务植树
Tree-planting Day植树节;植树节英语作文;我爱植树节;植树日
tree-planting date植树日
compensated tree-planting经济植树
Vigorously promote tree-planting大力倡导种树
The Tree-Planting Rhyme植树歌
The Tree-Planting Day植树节
Organize tree-planting activities组织开展植树活动