Next is the block device drivers layer, which contains the various block drivers for underlying devices.

接下来是块设备驱动器层，它包括针对底层设备的各种块驱动器。

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A discard request is part of the block layer and provides the means to discard blocks, eventually resulting in a trim command to a supporting ATA drive.

一个丢弃请求是此块层的一部分，提供了丢弃块的途径，并最终会导致向提供支持的AT A设备发出一个trim命令。

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The UIP application Block allows you to abstract the presentation layer code of your application into a separate layer.

UIP Application Block允许你抽象应用程序中表现层的代码到另外一个层。

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The launcher shoots the bottles at a velocity of 984 feet per second, fast enough to smash a double-layer breeze-block wall and allow assault troops to enter a building, according to the manufacturer, BCB International.

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