The upper layer is also known as the model device driver (MDD), and the lower layer is also known as the platform dependent driver (PDD).

上层通常被叫做模型设备驱动(MDD)，下层通常被叫做平台相关驱动(PDD)。

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The virtio_driver structure defines the upper-level device driver, list of device IDs that the driver supports, a features table (dependent upon the device type), and a list of callback functions.

virtio_driver 结构定义上层设备驱动程序、驱动程序支持的设备 ID 的列表、一个特性表单（取决于设备类型）和一个回调函数列表。

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Local access to the JDBC driver library files (and dependent license files) based on your hub database system.

基于hub数据库系统对JDBC驱动程序库文件(及相关许可文件)的本地访问权限。

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Ehrhart said the breakdown of ecosystem-dependent livelihoods is likely to remain the main driver of forced migration during the next few decades.

CNN: Climate change may displace up to 200 million