The second person is important for communication.

Six of one, half a dozen of the other.

On the other hand, we can consider other options.

This is the trivial name for this plant.

Cooking is second nature to her.

Secondary source of energy is important for sustainability.

The lock received an award for the best defender of the team.

Lock is a key position in a rugby team.

During the race, I got a second wind and finished it without any problems.

The Mesozoic era was a period of geological development of the Earth.