The practice of bolt support in reserved coal drift in mining pressure area is introduced, helpful conclusion is obtained through observation and analyse.

介绍了煤巷锚杆支护在动压区留巷的实践，并通过观测及数据分析，得出了有借鉴意义的结论。

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Through practice experience and observation in spot for many years, discovers that it is unavoidable to produce big crack or small crack in the concrete construction.

通过多年的现场实践经验以及现场观察，发现混凝土施工中难免会产生许多或大或小的裂缝。

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Through the development practice of ten years and more, it is verified that this set of observation system and method are effective in practice.

经十几年开发实践证明，这套观察系统和方法是行之有效的。

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For half an hour, they worked through the fine points of the observation and formulated plans for what she could practice next.

NEWYORKER: Personal Best