任何做药物试验的人都要担风险.Anybody who experiments with drugs is riding a tiger.这些试验的有效性已显得令人怀疑.The tests have been shown to be of dubious validity.他给他们详细地谈了他试验的情况.He told them in detail of his experiments....

“试验的”的英语可以翻译为：testing，[机] trial ...