One savory-but-little-noticed aspect of the takeover of Smithfield Foods by Chinese meat giant Shuanghui International Holdings Ltd. involves an obscure chemical called ractopamine.

　　中国肉类加工巨头双汇国际控股有限公司(Shuanghui International Holdings Ltd.)收购美国企业Smithfield Foods这桩交易一个美好但却很少有人注意的方面涉及一种名叫莱克多巴胺的化学物质。