The behavior animation of opposite flocks is studied, and tactics of action-selection level is discussed.

研究了敌对群体的行为动画，讨论了行动选择层的策略问题。

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When periodic signals are analyzed in the laboratory, we measure the frequency spectrum of signals usually by a selection level meter.

在实验室进行周期信号分析时，通常使用选频电平表来测量其频谱。

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The trouble is that the popularity is driven not only by the vast selection and the high level of customer service, but also -- and mainly -- by the deep discounts the company regularly offers.

问题在于，公司受欢迎的程度不仅仅取决于广泛的选择和高水平的客户服务，还取决于公司定期进行的折扣活动，这一点是非常重要的。

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This is interesting in as much as it shows how such thinking has changed over the years, but her real purpose seems to be to create doubt in the reader's mind about whether selection at the level of the gene is the only mechanism of evolution, which is what Mr Dawkins and his fellow selfish-geners believe.

ECONOMIST: Richard Dawkins under fire

Former education minister Martin McGuinness had moved to abolish the current secondary level education selection system hours before he left office in October last year.

BBC: NEWS | UK | Northern Ireland | Minister receives 11-plus report

Because selection was done at the local level by panels made up of parents, teachers and other members of each community, including non-government organizations, misallocation has been minimal.

CNN: Inside Asia's New Bank for the Poor