为世界粮食短缺问题找到长期技术解决方案的希望似乎很难实现。
The promise of finding long-term technological solutions to the problem of world food shortages seems difficult to fulfill.
由于难民很可能已经历了长期的粮食短缺，在第一次评估他们的状况和需要时，会有许多人已经患上营养不良症。
Since the population has already probably suffered a prolonged food shortage, many will be malnourished by the time of the first assessment of their condition and needs.
粮食等主要农产品供给实现了由长期短缺到总量平衡、丰年有余的历史性转变。
The supply of grain and other major agricultural products took a historic shift from chronic short ages to an overall balance with surpluses during good years.
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