Randomised trials, which are the gold standard in medical research, will be tricky to impossible: women are unlikely to accept a researcher's arbitrary instruction about where they should give birth.
医学研究的黄金准则，随机试验的方法，不但没有准头，且也是不可能的：准妈妈们不可能接受研究人员的对她在哪里分娩给出的任意指令。
Randomised trials, which are the gold standard in medical research, will be tricky to impossible: women are unlikely to accept a researcher’s arbitrary instruction about where they should give birth.
医学研究界的金标准—随机试验—几乎不可能完成：妇女不可能接受研究人员关于她们应该在哪里生产的武断指示。
As seen on the show Mythbusters, a penny won't pick up enough speed to crack a human skull. Wind resistance makes this impossible event even more unlikely.
正如《流言终结者》中曾经播出的，一分硬币永远不可能获得足够的速度穿过人的头骨，风的阻力会使速度更慢。
The facts: Though this is not quite as insane or as impossible as the others it is still highly unlikely.
事实说话：尽管这个理论并非像其他理论一样疯狂至极，但是仍然高度可疑。
They're not impossible, but they remain unlikely as long as politicians stay focused on using the emotions of the moment to bash some target.
不是不可能，而是在这个政客们都在充分利用目前这种情绪打击某些目标的当口，他们没希望。
Whenever people ask, my answer is no, Marie-Antoinette never said that, or at least it is so unlikely as to be impossible.
无论何时人们问我这个问题，我对此的回答都是“不，玛丽·安托瓦内特从来没有说过这种话”，或者至少是“她不大可能说出这种不靠谱的话”。
We say it to somebody who has an unrealistic idea or expects something that is impossible or very unlikely.
我们说这人有一个不切实际的想法或预计的东西是不可能的或不太可能。
It is impossible to know the effects of the eruption without guessing at the explosivity of the highly unlikely eruption and the total amount of the material erupted.
这是不可能不知道猜测在极不可能爆发爆炸性和材料总量的喷发产生的后果发生。
The natural occurrence of cracks and loss of soft film smallpox is unlikely, it was impossible.
软膜天花天然发生裂缝和脱落可能性不大，简直不可能。
It looks unlikely that medical science will abolish the process of ageing. But it no longer looks impossible.
医学看来还不太可能消除人类衰老的进程，不过这事现在看起来却不再是绝对不可能。
It looks unlikely that medical science will abolish the process of ageing. But it no longer looks impossible.
医学看来还不太可能消除人类衰老的进程，不过这事现在看起来却不再是绝对不可能。
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