Feudalism characterized the social system of medieval Europe.

Changes in the social system inevitably occur with time.

This system is necessary to maintain social fairness.

I am interested in the history of the Middle Ages.

The characteristic of this building is its unique design.

This new system enables efficient business operations.

Feudalism dominated medieval European society.

We plan to hold the meeting in Western European Time.

We should take responsibility as part of society.

He gave me a kiss filled with special affection, a love-attaching kiss.