"Any samples not taken by us under controlled conditions won't be accepted as evidence in court."

That's under controlled conditions, where a hundred people are ready to drop everything and help you.

I knew what the effect of that liquid was under certain controlled conditions.

But they had given her one demonstration under controlled conditions so she would know what to expect.

They didn't want them burning yet, only under controlled conditions.

A match is a tool for starting a fire under controlled conditions.

Then let it live at the lab, under controlled conditions, and see what happens.

If you can repeat these results under controlled conditions, they would be an interesting result!

We can study it under controlled conditions, here in the ship.

So she was admitted to a special hospital with controlled environmental conditions (described later, on p 173).