topic: 放松 , 自然 or 把心里話說出來
You should let your hair down.
你應該要放松些。
【講解】to let one’s hair down 的引申意思是指輕松、自然，或把心理的話說出來。
【情景一】很多名人啊，國家領導人沒人忙忙碌碌，很少有時間像老百姓一樣，享受好生活。
The president has to make so many official appearances that he seldom gets a chance to let his hair down and enjoy life like ordinary people.
總統要出席許多公開場合，因此他很少有機會像普通老百姓那樣輕松地享受生活。
【情景二】朋友之間不需要拐彎抹角，要坦誠相待，有什么話別憋在心里，坦率地說出來就好。 考試用書
Sally, we’ve been good friends for a long time. But lately I get the idea you are very much upset with me. I wish you’d let your hair down and tell me what’s wrong to make you feel this way.
薩莉，我們多年來一直是好朋友，可是最近我感到你對我非常不高興。我希望你能夠坦率地告訴我，到底是些什么事讓你這么不高興。