When I hear his name, old memories immediately come to mind.

When I hear that song, old memories come to mind.

When I heard his name, his smile immediately came to mind.

Leaves are floating on the pond.

Control characters are used to cause special actions on the computer.

The control rod adjusts the reaction of the nuclear reactor.

He is operating the equipment in the control room.

The doctor recommended a blood test to check my liver function.

This high-functionality smartphone has many convenient features.

His high-functioning smartphone greatly helps his daily life.