Optimism is the key to a happy life.

She is an optimist who always sees the bright side of things.

She always has an optimistic outlook on life.

An air conditioner is available as an optional extra.

Oral communication is an important skill in the workplace.

The orator delivered a powerful speech that moved the audience.

The symphony orchestra performed a beautiful piece.

I bought a beautiful orchid for my mother's birthday.

She is the organizer of the event.

Compare the translation with the original.