Ali was hooked up to an electrocardiograph.

阿里被心电图仪上。

All the speakers hook up to a single amplifier.

所有喇叭都在单一扩音器上。

The wireman hooked up a telephone.

线路工人已把电话装好。

The gas was hooked up.

煤气已装好。

He hooked up the doorbell.

他装好门铃。