He crept around the room in the middle of the night.

His apraxia makes it difficult for him to lead a normal life.

Water Margin is one of the four great literatures of China.

Cats are digitigrade animals, they walk on their toes.

His research mainly focuses on the plantigradism of mammals.

He learned about unguligradism in his zoology class.

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

His actions were considered part of propaganda by action.

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

Understanding the rules of 'Ha-gyou tenko' is difficult.