black box

The only problem was where to put her black box.

For the most part, science is a black box to the general public.

Now it looks like the inside of a black box.

Why do I just get a black box that doesn't play?

On the other hand, it was just a black box.

It seemed to be coming from the black box behind her head.

I said, talking to the small black box with his name on it.

This could be used to test whether a black box worked or not.

He put down the one black box and picked up the other.

It looked like a black box - a good big one.