Categorization is key to avoiding the dreaded three-hour build that runs all "unit tests."
为了避免运行所有“单元测试”所需的令人恐惧的三小时构建时间，分类是关键。
The analyses for wave connection forces are one of key technique to the tug-barge unit connected by three pins .
波浪系结力的预报研究是三销式推驳船组的关键技术之一。
Laser three-dimensional shaping is a new research hotspot, and powder feed unit is the key to this technology.
激光三维快速立体成型已成为新的研究热点，送粉器是激光三维快速立体成型技术中的关键技术。
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