n.<古>高龄，古代，古人;
英文例句/中文翻译：
1、
锅炉管板上应力场、位移场的分析仍是锅炉结构设计工作者的重要课题之一。
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2、
3、
结果：人口死亡的年龄分布具有低龄阶段和高龄阶段的两端死亡强度高，青少年和中年段死亡强度低的特征。
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An international currency senimar to be held in the southern Chinese city of Nanjing this week has evolved into an ungainly hybrid between official summit and academic discussion thanks to conflicting visions for the eve
Happiness knows no luxury, and having fun is more than children's prerogative, it's their field of expertise.Leave it to kids to kill time by creating the most enjoyable of games from scratch, just by making
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