I can't find my Allen key.

Cell biology is the study of the structure and function of cells, which are the basic units of life.

Neuroanatomy is an important field of study for understanding the structure and function of the brain.

He is a salary thief, contributing nothing to the company.

Moura goes to bed at 9 o'clock every day.

His leg is swollen.

Kibou is my best friend, she is always cheerful and energetic.

He was standing by the side of the incident, doing nothing.

Mou is a common surname in China.

His actions destroyed his family's happiness.