Ali was hooked up to an electrocardiograph.

阿里被连到了心电图仪上。

All the speakers hook up to a single amplifier.

所有喇叭都在单一的扩音器上。

The wireman hooked up a telephone.

路工人已把电话装好并通。

He hooked up the doorbell.

他装好了门铃。

The gas was hooked up.

煤气已装好并通了。