... nonincreasing value-type bilevel quadratic programming 双层规划 Forage Value Type 饲用价值类型 nullable value type 可空值类型 ...
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In the forage value type structure, the species of middling and lowness quality take the most even 52%, but those of high and fine quality only take 23%.
饲用价值类型结构以中、低等质量的种类最多占52%，而优、良牧草种类只占23%。
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