For years, those tests have found a small but persistent number of animals with drug residues, mostly antibiotics, that violate legal limits.
数年来，通过检测发现每年都有一小批动物身上有药物残留，主要表现为抗生素，已超过法律许可的界限。
For years, those tests have found a small but persistent number of animals with drug residues, mostly antibiotics, that violate legal limits.
数年来，通过检测发现每年都有一小批动物身上有药物残留，主要表现为抗生素，已超过法律许可的界限。
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