idiom > to wear a sad or worried expression
Contents
Worry about form or color
  Explanation: Shaped performance. Anxiety in the face shown. Described could not suppress his anxiety.
  Source: "Old Tang Zhi Five Elements," four years in June, the world is dry, fresh locust field, pray the prayer is invalid, the worry about form or color. "
  Examples: Each talked about the world changed, Noir ~, death depression to end. ★ "History of Qing Dynasty Song Weijun Biography"
No. 2
  成语:忧形于色
  发音:yōu xíng yú sè
  解释 :形:表现。忧虑的心情在脸上表现出来,形容抑制不住内心的忧虑。
  出处: 《旧唐书·五行志》:“四年六月,天下旱,蝗食田,祷祈无效,上忧形于色。”
  事例: 每谈及世变,辄~,卒抑郁以终。 ★《清史稿·宋维峻传》
English Expression
  1. v.:   wear a sad or worried expression