The children were playing by beating the pellet drum.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

In Japanese grammar, 'n-row irregular conjugation' is a very important concept.

The Acts of the Apostles is a part of the New Testament.

He conveyed the schedule of the meeting in a three-line email.

Cats are digitigrade animals, they walk on their toes.

He learned about unguligradism in his zoology class.

His research mainly focuses on the plantigradism of mammals.

His actions were considered part of propaganda by action.

One part is important.