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.
在一批结果得到确认时，将在继后的几个星期内继续对临床样本做进一步再检测，以便为危险评估提供最为可靠的基础。
While these first results are reassuring, further retesting of clinical specimens will continue over the next few weeks to provide the most reliable possible foundation for risk assessment.
同种产品不同批次之间的检测效果存有差异，而同类产品之间的检测效果差异更大，由此进一步确认，购买产品后并在实际使用前进行抽批检验是可取的。
Test performance varied between lots, and widely between similar products, confirming the advisability of lot-testing post purchase and prior to use in the field.
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