转动惯量

• 車(vehicle; cart; car)RADICAL
• 專(specialize in; concentrate on)PHONO-SEMANTIC

A wheel keeps spinning in one direction, so it's called rotating or turning.

• 云(cloud)PHONETIC
• 力(strength; power)RADICAL

Powerful strength like rolling clouds surge creates motion.

• 忄(heart; mind)RADICAL
• 贯(through; pierce)PHONO-SEMANTIC

Habit is something that has permeated through our mind for a long time.

• 旦(dawn; daybreak)PHONETIC
• 里(village; mile (unit of measurement))RADICAL

Measure each mile of the road right from dawn's first light.