He used a cotton swab to remove earwax.

I like eating bread crust.

Seimi is my best friend.

Aisen is my best friend.

His room was like a chaos.

She is learning the grammar of the present progressive form.

He drew a straight line using a T-square.

He explained in detail about the structure of the sphenoid bone.

This butterfly valve is used to control the flow of fluid.

The erector spinae is an important muscle for keeping the back straight.