The model is translated into a two level single object decision making problem with leader follower strategy with no relation between lower levels.

针对此问题，建立了考虑机群出力约束的机组组合模型，将问题转化为两层多下级无关联的主从递阶单目标决策问题。

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The Newsweek list of top U.S. high schools was made this year, as in years past, according to a single metric, the proportion of students taking college-level exams.

和往年一样，《新闻周刊》今年的美国顶尖高中排行榜是根据参加大学水平考试的学生比例这一单一指标编制的。

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At the individual level, a single cell isn't particularly important.

在个体层面，一个单个的细胞不是特别重要。

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Their memory improved significantly, so their intelligence level as taking by tests before and after compared to control group improved significantly after a single week.

他们的记忆力有明显改善，他们的智力水平,在实验前后进行测试，再与对照组相比,在仅仅一周后就有明显改进。

哈佛公开课 - 幸福课课程节选

Presidio Heights is made up of mainly two-level single family homes with coveted yards at the front, back and sometimes sides of the properties.

FORBES: The Country's Hottest Luxury Real Estate Markets

Let me explain at the pretty unsophisticated level my single law school course in Federal Taxation permits.

FORBES: Move up http://i.forbesimg.com t Move down

The inquiry led by Robert Francis QC criticised "every single level" of the health service.

BBC: Families plan legal action over care