graying

例句：

1. 1. As he grew older, his hair began to gray.
   随着他年龄的增长，他的发色开始变灰。
2. 2. The old man's eyes were starting to gray.
   那位老人的眼着开始变白了。
3. 3. As the years passed, the once-beautiful tree was now graying.
   岁月流逝，那棵曾经美丽的树现在开始变白了。