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广义上讲,中国有三分之二是山区,平地只有三分之一,平地的土地资源更为稀缺,并且担承着维护国家粮食安全等重
Broadly speaking, two thirds of China is mountainous. Only one third of the land is flat. Land resources in the plains are more scarce and bear the weight of safeguarding national food security