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actives    音标拼音: ['æktɪvz]
活性物

活性物


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    The jump from category one to two corresponds with a 200 Cuban peso increase in profit per year, per hectare, and a 1400 peso increase per year per unit of labor The jump from two to three is even more impactful, with a 1600 peso increase per year per hectare, and a 3000 increase per year per unit of labor (Sosa et al , 2013)
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    The crops, livestock, and seafood produced in the United States contribute more than $300 billion to the economy each year [1] When food-service and other agriculture-related industries are included, the agricultural and food sectors contribute more than $750 billion to the gross domestic product
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    Nearly 3 Billion Birds Gone Since 1970 The first-ever comprehensive assessment of net population changes in the U S and Canada reveals across-the-board declines that scientists call “staggering ” All told, the North American bird population is down by 2 9 billion breeding adults, with devastating losses among birds in every biome
  • List of U. S. states and territories by population - Wikipedia
    The states and territories included in the United States Census Bureau's statistics for the United States population, ethnicity, and most other categories include the 50 states and Washington, D C Separate statistics are maintained for the five permanently inhabited territories of the United States: Puerto Rico, Guam, the U S Virgin Islands





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