grove
n.小树林；果树林，果园A grove is a group of trees that are close together.
例：open fields and groves of trees.
开阔的田野和片片树林
woods
n.树林，林子（美国英语通常用woods）A wood is a fairly large area of trees growing near each other. You can refer to one or several of these areas as woods, and this is the usual form in American English.
例：About a mile to the west of town he came upon a large wood.
他在镇子以西约一英里处偶遇一大片林地。
forest
n.森林；树林A forest is a large area where trees grow close together.
例：25 million hectares of forest.
2，500 万公顷的森林
