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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Brazil is among the world champions in grade repetition, with 30% more children in primary school than the total in the 7-14 age group.

巴西的年级重复率挤身于世界前列，其在校小学生的数量竟然比7 - 14岁的儿童总数还多30%。

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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