通用汽车从未打算出售欧宝，因为欧宝掌握着众多其小型汽车的核心技术资料。

GM had never wanted to sell Opel, which is the repository of much of its technology for small cars.

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本文以通用串行总线为设计基础，分析并讨论了USB的体系结构、通信协议等核心技术。

With the commonly used serial bus as design basis, the kernel technologies, e. g., architecture and communication protocol of USB are analyzed and discussed.

youdao

本文以通用串行总线为设计基础，分析并讨论了USB的体系结构、通信协议等核心技术。

With the commonly used serial bus as design basis, the kernel technologies, e. g., architecture and communication protocol of USB are analyzed and discussed.

youdao