Why does a man's hair become gray first?

为什么男人的头发先变白呢？您多大？

youdao

If we add more sheets of paper, the color begins to become gray.

若是多加几张纸，颜色开始出现灰灰的。

youdao

Switching to "Airplane Mode" disables only "Mobile Data" and button become gray.

切换到“飞行模式”只停止“网络数据传输”而且按钮变成灰色。

youdao

Arrows pointing to shadowy tumors become invisible in the gray.

NEWYORKER: A New Page

The reintroduction of gray wolves into Yellowstone has become a rare success story in the battle to save endangered species in the United States.

CNN: Planet in Peril: Environmental Coverage - Special Reports from

But his search-and-rescue training "gave him a purpose, " Gray said, adding that Riley has become an important partner in his efforts as a firefighter.

CNN: To the rescue -- finding a purpose for rejected shelter dogs