The engine is idling.

This area is very quiet.

Beautiful Chinese elder is blooming in my garden.

He played the ninth note of the shí-èr-lǜ, Isoku, on the piano.

My son says he wants to become a doctor.

I think that adding anything more to this already perfect function would be superfluous.

Tomorrow, I will go to the mountain on a school excursion.

His explanation was impossible to understand.

He is a famous philosopher.

He is immersed in the study of positivism.