Ali was hooked up to an electrocardiograph.

阿连到了心电图仪上。

All the speakers hook up to a single amplifier.

所有喇叭都接在单一扩音器上。

The wireman hooked up a telephone.

线路工人已把电话并接通。

He hooked up the doorbell.

了门铃。

The gas was hooked up.

煤气已并接通了。