He was killing time by reading a book while waiting.

Let's get to work immediately.

We were given a tour of the factory by the person in charge.

Well then, I'm off.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

This system enables real-time operation.

We will start the meeting at 3 p.m. Central European Time.

We plan to hold the meeting in Western European Time.

I will start the meeting at 9 a.m. Eastern European Time.

The time complexity of this algorithm is O(n).