The proportion of the low age groups of Chinese carps increased and the advanced age group decreased;
四大家鱼群体结构中低龄鱼比重上升，高龄鱼比重下降；
Peritrochanteric fracture represents a significant risk in every age group but especially in advanced years when they represent a risk to life.
转子周围骨折在每一个年龄组都可能发生，但随着年龄的增加，其带来的危险也随之增加。
Marriage among the same age group who hold bachelor's or more advanced degrees, meanwhile, fell 4 percentage points over that time, to 52%.
与此形成对比的是，在同一年龄组中，大学学历以上的已婚年轻人占比同期下跌4%，为52%。
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