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Sustainability must be profitable, or it won't be sustainable—this is the challenge we must solve in modern farming.《The Grain Frontier》
The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.
解释:国家每做一件事必然是有毁谤也有赞美,忠臣把毁谤都加在自己身上,而把赞美都归于君主。
"The human figure is the most profound subject an artist can explore."