中国农产品贸易结构演化及对粮食安全的影响
王念, 程昌秀, 林耿

Evolving agricultural trade structure and its impact on food security in China
WANG Nian, CHENG Changxiu, LIN Geng
图4 农产品净出口程度与波动水平分级结果
Fig. 4 Net export degree and volatility level of agricultural products