LS的怎么感觉很别扭，不符合汉语表达习惯，有MT痕迹！
地道翻译：
1.大多数药品都是被身体视为异物的化学物质,因此,不同程度地具有毒性
--Most of drugs are viewed as chemical substances of foreign matter by our body,thus they are toxic to some extent.
2.There is considerable controversy as to the value of routine toxicology testing, as many differences between species, especially between man and rat, mouse and dog, have been reported.
--关于常规毒理学试验的价值存在很大争议，因为物种间的差异，尤其是人鼠间差异以及猫狗间差异已经有过相关报道。
3.Caffeine may relieve hypertensive headache and reduce cerebral blood, resulting from cerebrovascular contraction.
--咖啡因可缓解高血压引起的头痛以及减少因脑血管收缩引起的脑部血液流量。