A mechanical toy dog.

机械的玩具尾随。

youdao

I used to have a mechanical toy dog.

我以前有一只玩具机械狗。

youdao

Drones are already able to take off, fly a mission and land without any human intervention, and a mechanical dog developed by the Pentagon can walk for 20 miles (32km) without a break and obey voice commands.

BBC: Future tech: Smart fabrics and other forecasts

The mechanical "dog" is already able to move about a varied, rugged terrain while carrying a load.

BBC: BigDog four-legged robot now sports throwing arm

Aquabot was easy to take in and out of the pool, and the dog, which is prone to barking at the human cleaner, treated the mechanical version with blessed indifference.

FORBES: Magazine Article