Calculating the trajectory is difficult.

He is an expert in ethology.

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).

We went on a trip using the expressway.

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

I am planning to go to Gangwon in Korea next week.