Ali was hooked up to an electrocardiograph.

阿里被连到了心。

All the speakers hook up to a single amplifier.

所有喇叭都接在单一扩音器。

The wireman hooked up a telephone.

线路工人已装好并接通。

He hooked up the doorbell.

他装好了门铃。

The gas was hooked up.

煤气已装好并接通了。