最优化问题是工程设计、科学研究、经济管理等众多领域经常遇到的一类问题。
Optimization problems often emerge in many fields, such as engineering design, science research and economic management.
马里兰州巴尔的摩市，太空望远镜科学研究所，现在成为具有划时代意义的太阳系外类地行星搜索计划的合作人之一。
The Space Telescope Science Institute (STScI) in Baltimore, Md., is partnering on a historic search for Earth-size planets around other stars.
报道药用爬行类共18种，其中有国家二级重点保护野生动物4种，国家保护的有益的或者有重要经济、 科学研究价值的陆生动物11种。
Among them, 4 species were the second class state key protected wildlife in China, 11 species were useful or important to economy and scientific research category.
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