methylene blue reduction milk test 牛奶美蓝还原试验
milk reduction
减少牛奶
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In its September Livestock, Dairy and Poultry Outlook, the USDA notes an overall milk production reduction for 2012 based on a lower forecast for milk yield per cow.
FORBES: Dairy
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