Superfluidity is a part of physics, referring to the phenomenon where certain liquids flow without friction.

He became a one-eyed person due to an accident.

Oleum is a very dangerous chemical, and it requires great caution when handling.

The flow of the river is very quiet and comfortable.

He was hospitalized due to mental derangement.

A dwarf planet is one of the smallest celestial bodies in the solar system.

My older brother is currently working hard on his research as a graduate student.

He took a tranquilizer to calm his nerves.

He is learning English phonetic symbols.

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