But the medical field truly is vast, and there is much we still don't know. When developing new treatments, researchers must ultimately-no matter how many pharmacological, toxicological, and animal tests they have run-test them on people to find out if they work.
然而無論如何，醫學領域浩瀚，迄今仍有太多的未知，面對種種讓人束手無策的各式疾病，不管經過再多的實驗室藥理、毒理實驗及動物試驗，最後還是得回到人體上證明。