24岁的俞碧儿(音译)2009年大学刚毕业时就选择了参军。

Yu Bi’er, 24, joined the army in 2009 as a fresh college grad.

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李英杰，李捷，于长海，俞建琦，张文，夏晖目的总结重症肺大疱的手术治疗经验。

Objective To discuss the experience in surgical treatment of gravis pulmonary bulla and in management during peri-operation.

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采用俞茂宏统一强度理论对具有圆孔的大薄板材料进行了极限分析，得到了统一解形式。

In this paper, Yu Maohong's unified Strength Theory is used to analyze the ultimate load of a thin plane with a hole and a unified solution is obtained.

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