如今，出现了中等技能水平的人才短缺问题。

Now shortages are appearing at the mid-skill levels.

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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.

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水井是更可靠的淡水来源，加州希望这些深井能解决他们严重的水资源短缺问题。

Wells are much more reliable sources of freshwater, and California is hoping that these deep wells may be the answer to their severe water shortage.

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