This machine is of LV model, double-row, double-step, double function, water-cooling, and intercrossing, fixed, no basic reciprocating piston type air compressor.

本机为L型、两列、两级、双作用、水冷、有十字头的固定式往复活塞空气压缩机。

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Objective We investigated the feasibility of using computer assisted design in double-step distraction osteogenesis in the reconstruction of mandibular segmental defects after tumor resection.

目的：探讨计算机辅助设计在定向二次牵引成骨术修复一侧下颌骨肿瘤术后缺损中的应用及效果。

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Step 3 Check and double-check your information.

第三步 检查并且再次检查你的信息。

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LeBron James scored 28 points in 30 minutes, Udonis Haslem had his first double-double of the season and the Heat moved a step closer to wrapping up home-court advantage throughout the NBA playoffs by topping the Bucks 94-83.

NPR: Heat Tie Team Mark With 61st Win, Top Bucks 94-83

Some Costco customers do a double-take when they spy the seasonal aisles, quickening their step and pushing their trolleys past.

BBC: Is it too early to be Christmas shopping?