这是因为这类试验主要关注测试药物的安全性而不是药效。
That is because such trials are concerned mainly with testing a drug’s safety, not its efficacy.
研究测试药物制造商开发的疫苗的安全性和效力并有助于决定剂量及它是否能和季节流感疫苗一起使用。
The studies will test the safety and effectiveness of vaccines developed by drug makers and help determine dosage and whether it can be given with a seasonal flu shot.
他们总结：“尽管尚有不确定性，但是几乎没有证据表明被试药物在心血管方面的使用是安全的。”
"They conclude:" Although uncertainty remains, little evidence exists to suggest that any of the investigated drugs are safe in cardiovascular terms.
这是因为这类试验主要关注测试药物的安全性而不是药效。
That is because such trials are concerned mainly with testing a drug's safety, not its efficacy.
一种新系统制造出来的极细小的血管可以改变测试药物的方法。
A fast new system that makes ultra-tiny human blood vessels could change the way we test drugs.
结果：中度刺激的受试药2种，轻度刺激的8种，无刺激反应的8种。
RESULTS 2 drugs showed moderate skin irritation, 8 slight irritation and 8 no irritation.
针对供试药物和系统数目的多少提出了两种方法：逐步组合法和择优组合法。
Depending upon the number of solvent systems and drugs to be tested, two kinds of methods, "stepwise combination" and "combination by good choice", were provided.
一组参加者将被给予测试药物，而另一组参与者会获得目前普遍使用的疟疾药物。
Participants in one group will be given the test drug while participants in the other group will be given the drug that is currently being used for malaria.
有些时候测试药物，疫苗和其他生物制品及医疗器械需要使用动物，主要是为了检测医药产品的安全性。
Animals are sometimes used in the testing of drugs, vaccines and other biologics, and medical devices, mainly to determine the safety of the medical product.
有些时候测试药物，疫苗和其他生物制品及医疗器械需要使用动物，主要是为了检测医药产品的安全性。
Animals are sometimes used in the testing of drugs, vaccines and other biologics, and medical devices, mainly to determine the safety of the medical product.
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