graying是什么意思？

graying

英['greɪɪŋ] 美['greɪɪŋ]

• n. 泛灰（色）；

例句

• Several studies suggest smoking can lead to premature graying and hair loss. 最后,几项研究表明,吸烟可导致过早老龄化和脱发.
• The doctor was in his fifties, graying and distinguished. 那位医生,五十来岁, 头发花白,仪表端庄.
• The doctor, in his fifties, graying and distinguished, was a solid performer. 那位医生, 五十来岁, 头发花白,仪态端庄, 是位老练的表演者.
• Bonnie had graying, light - brown wavy hair that she pulled back into a large barrette. 邦妮有着一头趋向灰白的淡棕色卷发,往后梳起并用大发夹束了起来.

英语六级真题

Richard Jackson and Neil Howe of America's CSIS, in a thoughtful book called The Graying of the Great Powers, argue that, among other things, the ageing of the developed countries will have a number of serious security implications.
出自-2010年12月阅读原文