At the same time

Their departures were at the same time.

They departed at the same time.

I bid him come towards me and give me his letter, at the same time throwing down, carelessly, a book I had in my hands.

I'm working. But at the same time, I'm exercising too.

His service as chairman was at the same time as his board membership

However, with the dainty volume my quondam friend sprang into fame. At the same time he cast off the chrysalis of a commonplace existence.

At the same time, it is pouring money into cleaning up the country.