陈伟(音译)是人民大学人口与发展研究所的一位专家，他预计，至2040年，将有4亿年龄超过65岁的人口——总人口比例的四分之一。
There will be 400 million people over 65 by 2040 - a quarter of the population - estimates Chen Wei, an expert at Renmin University's population and Development Research Institute.
分折了当前人机系统研究所面临的问题及发展趋势。
Problems and development tendencies of the man-machine systems study are analysed.
分析了目前遥感蒸散研究所面临的问题和发展趋势。
Finally, the problems faced in the research of the land surface evapotranspiration based on the remote sensing technology and its future development trends were analyzed.
综述了用于行星探测的跳跃机器人(PEHR)的研究现状，分析了PEHR研究所面临的问题，并预测了其发展趋势。
Research status of hopping robots for planetary exploration (PEHR) is reviewed, the main problems in its development are analyzed, and the development trend is predicted.
在进入美国住宅与城市发展部前，他在位于马萨诸塞州剑桥市的林肯土地政策研究所工作。
Prior to joining HUD, he was research fellow at the Lincoln Institute of Land Policy in Cambridge, Massachusetts. Mr.
在进入美国住宅与城市发展部前，他在位于马萨诸塞州剑桥市的林肯土地政策研究所工作。
Prior to joining HUD, he was research fellow at the Lincoln Institute of Land Policy in Cambridge, Massachusetts. Mr.
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