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[ri'dju:s]
[k?m'pli:tli]
sand n.沙
sandstorm n. 沙暴
change into 转换成，变成
desert n. 沙漠
human being 人
although conj. 尽管,虽然
reduce v. 减少
completely adv. 彻底地,完整地
rich, save, forest, plant, affect, protect
How sandstorms come into being?
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4
1
5
3
6
2
wash the earth away
many trees
change into desert
forests gone
sandstorms come into being
cut down trees