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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Here is the mostly employed and also approved substance intended for managing significant persistent soreness, in the form of Tramadol extended-release capsule.

这里是就业，因此大多核准管理的曲马多缓释胶囊的形式显着的持续性疼痛打算物质。

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It had been an exciting but sluggish contest, owing partly to the unavoidable torpor that accompanies televised football, but mostly because of the persistent confusion brought by the NFL's great 2012 boondoggle: replacement officials.

WSJ: Jason Gay: Curse of the Replacements

After he moved to Paris, he socialized mostly with his family and, since he was a suspicious man who suffered from a mild but persistent persecution complex, with a small circle of trusted associates.

NEWYORKER: Silence, Exile, Punning