在所有重要的经济农作物中，研究最少的是棕榈树。
Of all economically important plants, palms have been least studied.
海平面上升、农作物产量减少、更猛烈的风暴和更多令人沮丧的后果所造成的经济影响将是毁灭性的。
The economic impact of rising sea levels, reduced crop yields, fiercer storms and many other doleful consequences would be devastating.
毛里塔尼亚、塞内加尔、马里、布基纳法索、尼日尔以及乍得等国家被蝗虫吞噬了所有的农作物，造成了成百上千万美元的经济损失。
Mauritania, Senegal, Mali, Burkina Faso, Niger and Chad have all lost crops worth.
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