He is the type of person who understands ten from hearing one.

Bile salts play an important role in the digestion of fats.

In behavioral sciences, the use of metatools plays a crucial role.

She was going through puberty and was confused by the changes in her body.

Nitrous oxide is one cause of air pollution.

He is doing squats to train his biceps femoris muscle.

Verbs of the lower second conjugation are important for understanding Japanese grammar.

In learning Japanese grammar, understanding the upper two-step conjugation is important.

A binary operator is one of the basic concepts in algebra.

The goods in this store are being sold for dirt cheap.