I live with the minimum amount of things.

In this experiment, we will use the International System of Units.

An imaginary unit is an important concept in mathematics.

An astronomical unit represents the average distance from the Earth to the Sun.

This product has a very small assembly unit.

An identity matrix is a square matrix in which all the elements on the diagonal are 1 and all other elements are 0.

Old scientists discovered that calcium was important for bone health.

I learned about casein in biochemistry class.

Iodine is an important nutrient for the human body.

He struggled to understand the meaning of that lexeme.