三北防护林 sānběifánghùlín Great Green Wall Origin Definitions Defs Strokes Stroke Words Sentences Sents 三北 sānběi Three Norths (abbreviation) the Three Norths region of China, referring collectively to 东北 dōngběi (Northeast), 华北 huáběi (North), and 西北 xīběi (Northwest)防护林 防護林 fánghùlín shelterbelt a line or area of trees planted to provide protection from wind, water, or sand and to improve the environment