I always hear noise coming from his room.

My brother is a famous biologist.

I use a tram for commuting every day.

The continental slope is a part of the seafloor topography, connecting the continental shelf and the deep sea floor.

He is a world-renowned ichthyologist.

The SI system is a standard unit system used worldwide.

My uncle is a famous zoologist.

Hearing his words, I was deeply moved and started to cry.

She is a mezzo-soprano singer.

He was enveloped in melancholy.