In order to maintain the security of encrypted communication, we perform key exchanges regularly.

They were trading goods through barter.

Please clean up your room right now.

He is outstanding in his field.

Toshin came up with a sagacious way to solve the problem.

That female bear was fighting to protect her children.

Shunji is my best friend.

Could you bring my notebook?

He brought me an old map.

He showed me his new toy.