12 词条主页 > 词条 > 拉丁美洲西班牙语 (XL) > elevadores públicos
elevadores públicos
Grain elevators in which bulk storage of grain is provided for the public for a fee. Grain of the same grade but owned by different persons is usually mixed or commingled as opposed to storing it "identity preserved." Some elevators are approved by exchanges as "regular" for delivery on futures contracts.
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deriva genética
Changes in the frequencies of alleles in a population that occur by chance, rather than because of natural selection.
