What's more, it's impossible to hide the fact that people are receiving Botox, he adds – and that would invalidate the double-blind nature of the experiment.
此外，他还补充道，谁在注射肉毒杆菌素这一事实是无法掩盖的，这会使试验失去双盲性。
2
The experiment was double-blind-neither the subjects nor the scientists knew which liquid was which-a technique considered especially strong in research science.
因为使了一种被认为特别强的技术，这个实验是双盲的，无论实验对象还是科学家都不知道哪个液体是什么。
3
DESIGN: Randomly doubleblind and control experiment.