From what I've read, he failed his random drug test and they found performance-enhancing drugs in his system.

亚历克斯：据我所知，他没有通过随机药物测试， 他们在他的系统中发现了提高成绩的药物。

Three years' worth of random tests by the league plus independent tests we had run to quash the rumors.

大联盟三年的不定期抽查外加我们为粉碎谣言进行的独立测试。

And supermarkets in Britain have agreed to update the government every three months on the results of random DNA tests carried out on beef to ensure it contains no other meat.

英国超市同意，每三个月向政府报告对牛肉随机进行的DNA检测结果，确保牛肉中没有掺杂其他肉类。