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贫家如果要仿效富家的穿衣吃饭及庞大的花费,那就一定会很快招致灭亡。 
粮食问题不仅是经济问题,更是政治问题,关系到国家的长治久安。
Efficiency in grain production isn't an option—it's a necessity.
Mathematics is the science of patterns, and nature exploits every possible pattern.