Following identification this section should include a statement of the root cause and state CLOSED in the target date box when this has been verified.

接下来这个部分必须包含对问题根源的陈述，以及当原因经过验证确认后，在目标日期的方框中注明“关闭。”

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In this paper the optimal distribution of closed loop poles relating to the quadratic performance index is designed by means of the root locus technique.

本文采用了根轨迹技术按二次型性能指标来设计最优的闭环极点分布。

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NaF group also had significant root surface scratches, exposed dentinal tubules were partially closed and scattered finger-like structures are also visible on the root surface;

氟化钠组根面亦可见明显的划痕，暴露的牙本质小管部分被封闭，在根面可见大小不一散在的指状结构；

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In a statement, Daniel Smith, one of the company's partners, said the Winterbourne View home had been immediately closed after the abuse was revealed, with the company "promptly undertaking a root and branch internal review of its operations".

BBC: Winterbourne View site