很多已经试验，只是少数已经成功…。
小白鼠身上的试验已经被重复了很多次，并扩展到从酵母到果蝇、蠕虫、鱼、蜘蛛、老鼠和仓鼠等各种生物。
The rat findings have been replicated many times and extended to creatures ranging from yeast to fruit flies, worms, fish, spiders, mice and hamsters.
那意味着，我已经尝试过很多关于素食理想食品的试验。
That said, I've done a lot of experimenting with vegan dream food.
类似的试验已经做了很多次，试验结果显露出的基本模式是相同的。
These sorts of experiments have been done over and over again, and the results reveal the same underlying pattern.
他还没准备好在人身上试验，但他已经用猴子做了很多实验。
He is not yet ready to try it in people, but he has been conducting experiments on monkeys.
为了弥补这个缺陷很多方法已经被实验过了，你还记得微软的智能显示器和超移动电脑吗，这两者就是曾经的试验品。
Many other attempts to fill that gap have flopped; who now remembers Microsoft's "Smart Displays" and "Ultra-Mobile PC", for instance?
这种疾病已经被证明对化疗和其他一些药物治疗有抗药性，在过去20年中只有两种药物被批准应用于胰腺癌的治疗，其他很多药物都倒在了三期临床试验上。
The disease has proven to be resistant to chemotherapy and other drugs, and in the past 20 years, only two treatments have been widely approved, with many other drugs failing in Phase III trials.
已经有很多临床试验研究了骨的抗再吸收治疗在预防骨密度丢失和骨折中的作用。
Numerous clinical trials have studied the role of bone antiresorptive therapy for prevention of bone density loss and fractures.
已经有很多临床试验研究了骨的抗再吸收治疗在预防骨密度丢失和骨折中的作用。
Numerous clinical trials have studied the role of bone antiresorptive therapy for prevention of bone density loss and fractures.
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