The osteopenia incidence rate of lumbar vertebrae of each age grade is obviously higher than that of femoral neck (P < 0. 05 ). The incidence of the osteopenia increased with age increasing.

各年龄组腰椎低骨量发生率显著高于股骨颈（P〈0．05），两部位低骨量发生率均随年龄增加而逐渐增加。

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3rd grade (age 8).

三年级(8岁)。

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For Abby, a breakthrough moment came at age 9: She started reading voraciously, and today reads well above the seventh-grade level.

对于Abby来说，突破性进展发生于9岁的时候：她开始狼吞虎咽地阅读起来，到今天，她的阅读能力已经强于7年级的孩子了。

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The former Munster coach has been given the task of looking after Ireland's elite talent under the title of Performance manager, Age Grade Rugby.

BBC: SPORT | Rugby Union | Irish | New role for Kidney

''In Ireland we see an urgent need for an age-grade performance manager.

BBC: SPORT | Rugby Union | Irish | New role for Kidney

But Mitchell made steady progress through Welsh rugby's international age-grade sides before making appearances from the bench on that north America tour against Canada and the United States.

BBC: Wales prop Craig Mitchell to join Ospreys' exodus