As countries focus on food, they need to distinguish between three classes of problem: structural, temporary and irrelevant.

各个国家都在关注粮食问题，而有三种不同层次的问题需要区别对待：结构性问题，暂时性问题和无关的问题。

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As countries focus on food, they need to distinguish between three classes of problem: structural, temporary and irrelevant.

各个国家都在关注粮食问题，而有三种不同层次的问题需要区别对待：结构性问题，暂时性问题和无关的问题。

youdao