相互 (xiāng hù): ระหว่างกันและกัน

They helped each other and finished the homework together.

Friends should respect each other.

We learned from each other and improved quickly.

They looked at each other and then smiled.

The people of the two countries understand each other, and their friendship grows deeper.

Classmates should help each other.

We exchanged gifts with each other.

The two countries mutually respect each other's sovereignty and territorial integrity.

These factors interact with each other.