He seemed to be thinking about something and mumbled, 'Mmm.'

This poem is written in classical Japanese.

They are like me.

He dislikes his new job.

His passion for music is incredible.

West Nile fever is an infectious disease transmitted by mosquitoes.

This house has good insulation, so it's warm even in winter.

This house is built with materials that have high insulation.

In this intense heat, he continued to work while sweating.

I baked bread with the remaining heat after cooking.