"gray hair" in Chinese (Simplified)
白发
Definition
失去原本颜色、变成灰色或白色的头发，通常是因为年龄增长。也可以指单根变色的头发。
Usage Notes (Chinese (Simplified))
略带口语色彩，多用于谈论年龄增长或外貌。常见说法如“长白发”、“有白发”。有时用作比喻，指经历多、变得成熟。
Examples
My father has a lot of gray hair now.
我爸爸现在有很多**白发**。
She found her first gray hair yesterday.
她昨天发现了第一根**白发**。
Some people get gray hair at a young age.
有些人很年轻就长**白发**。
Don’t worry, a few gray hairs just mean you’re getting wiser!
别担心，有几根**白发**说明你更有智慧了！
She dyes her gray hair to look younger.
她把**白发**染黑了，看起来更年轻。
After the stressful project, I swear I have more gray hair than before.
做完那个压力大的项目后，我觉得自己的**白发**变多了。