Whether it is arguing until ‘blue in the face’ or feeling ‘green with envy’ the English language is well-stocked with idioms linking color to emotion.
无论是争辩到“脸色发蓝”还是感觉“嫉妒得发绿”，英语中还真不缺将颜色和情绪联系在一起的习语。
Now for the first time, scientists have shown that people actually do change hue depending on their feelings.
不过这是科学家第一次表明，人类的脸色确实会随着情绪的变化而改变。
Although it is a subtle alteration to skin tone and complexion around the nose, eyebrows, cheeks or chin, the effects are picked up subconsciously by observers, making it very hard to hide emotions.
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