Natural language understanding is an important field of artificial intelligence.

The government declared a state of emergency to prevent the spread of the new coronavirus.

Let's get to work immediately.

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

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).

When I happened to pass by the library, I ran into an old friend by chance.