It is the building block of human brain tissue and is particularly abundant in the grey matter of the brain and retina 它是构建人的脑组织的重要原料,大量存在于大脑灰质和视网膜中。
Braininess in kids may not depend on the amount of gray matter so much as how fast it both thickens and thins as they grow up 儿童的脑力并非只依靠大脑灰质总量而定;随著儿童成长,灰质厚度增减的速度更重要。
Health ministers from the six countries said that they would intensify efforts to immunize 250 million children against polio by the end of this year 非洲六国加强对儿童大脑灰质炎疫苗接种工作, 2 。 5亿儿童从中得益。