무료free; no charge; complimentary 요금fare; fee; charge 요리cooking 요리사cook; chef 음료drink; water; soda 음료수drinking water 재료material; ingredient 통행료toll; passage money 통화료telephone service charge; call charge 항공료airfare; flight fare

청취율ratings 할인율discount rate 환율exchange rate 효율적being efficient; being effective 효율적efficient; effective 감소율reduction ratio 비율ratio; proportion 비효율적being inefficient 비효율적inefficient 사망률death rate