求翻译：貧窮的國家大都以農業為主，農產品及原材料的附加價值低，貿易逆差大，農產品價價容易受世界市場的波動所影響，故人均收人低，以致欠缺能力購買食物。另外，貧窮國家科技落後，欠缺資源，以致農業生產力低和產量少。是什么意思？

Poor countries, mostly in agriculture, agricultural products and raw materials with low added value, a large trade deficit, prices of agricultural products are vulnerable to price fluctuations in world market, so the per capita income is low, resulting in a lack of ability to purchase food. In addit

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Most of the poorest countries dominated by agriculture, low added value for agricultural products and raw materials, the trade deficit, susceptible to world market fluctuations in the prices of agricultural products price, so the low per capita income, which lacks the ability to buy food. , Poor cou

Poor countries, mostly in agriculture, agricultural products and raw materials with low added value, a large trade deficit, prices of agricultural products are vulnerable to price fluctuations in world market, so the per capita income is low, resulting in a lack of ability to purchase food. In addit