不合群的拼圖
Ractopamine - Wikipedia, the free encyclopedia 我可不想一直跟妳們在一起!Ractopamine is a drug used as a feed additive to promote leanness in animals raised for their meat. Pharmacologically, it is a beta-adrenergic agonist. It is the active ingredient in products known as Paylean for swine and Optaflexx for cattle, developed ...
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