My grandmother really likes Tsushima's specialty, the Tsushima sweet potato.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

She looked up at the dazzling stars.

This report is very detailed.

I used a digital recorder to record the content of the meeting.

He is immersed in a world of fantasy.

My friend came from Kuwait.

This food is preserved in a vacuum.

The theory of Banach spaces plays an important role in many fields of mathematics.

Euclidean space is one of the basic concepts in mathematics.