The scientists then gently brushed the real and fake hands.
接着,科学家用刷子在真手和假手上轻轻掠过。
Spotting the difference between real and fake can be crucial in everyday life
识别真正的微笑和虚伪的微笑对于日常生活来说很关键。
Sometimes need to be an expert to tell the difference between real and fake.
而且有时候只有专家才能分辨出正品和仿品的区别。
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