The use of case studies will from the reality of the classic case-control framework for theoretical analysis to identify the gaps, come to the conclusion of the stud.

采用案例分析的形式将经典案例中的现实对照理论分析框架，找出其中的差距，得出研究的结论。

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Company main: rivet, screw, nut, stud, spring screws, various case fasteners.

公司主营：铆钉、螺柱、螺丝、螺母、弹簧螺丝、各种机箱紧固件等。

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But in the case of a colt with a potentially stellar stud career ahead of him, you know, you had to try everything.

NPR: Heartbreak at the Preakness Stakes