One day a girl asked her teacher Mary, "Mary, why dose a man's hair become gray before his mustache and beard?"
一天，一个小女孩问她的老师玛丽：“玛丽，为什么男人的头发比胡子先白？
This synaptic pruning, as it is called, causes the brain's cortex-the outer layer of gray matter where we do much of our conscious and complicated thinking-to become thinner but more efficient.
我们称之为突触的自我修剪，保持意识清醒和用来复杂思维的大脑皮层，外面的灰质外层变得更薄但更高效。
At that moment, I found that the color of the aerial fog slowly changing, by gray eventually become yellow.
就在这时，我发现空中雾的颜色慢慢改变，由灰白色最终变成土黄色。
When the line passes through gray circular touch points, which gradually expand, flushing with color as they become active, you need to tap them or hold your finger down for longer notes.
当扫描线经过不断变大的灰色音符的圆心时，音符被激活变红，此时你需要点击音符或是长按后底部的音符不松开（直到该音符结束）。
To strengthen and value the construction and management of the gray literature resources has become the important content of the college library work.
加强和重视灰色文献资源的建设和管理已成为图书馆工作的重要内容。
The younger, on the contrary, not wishing to become the wife of an old man, was equally zealous in removing every gray hair she could find.
相反，年轻的女人则不希望成为老男人的情人，就同样不断地拔去男人的白头发。
I only knew the memory lived in me, a perfectly encapsulated morsel of a good past, a brushstroke of color on the gray, barren canvas that our lives had become.
我只知道记忆与我同在，将美好的往事完美地浓缩起来，如同一笔浓墨重彩，涂抹在我们那已经变得灰白单调的生活画布上。
I only knew the memory lived in me, a perfectly encapsulated morsel of a good past, a brushstroke of color on the gray, barren canvas that our lives had become.
我只知道记忆与我同在，将美好的往事完美地浓缩起来，如同一笔浓墨重彩，涂抹在我们那已经变得灰白单调的生活画布上。
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