n. any long and arduous undertaking
n. a footrace of 26 miles 385 yards
n. a battle in 490 BC in which the Athenians and their allies defeated the Persians
n. 马拉松, 耐力的考验
1. I am training for a marathon next month.
我正在为下个月的马拉松训练。
2. Many people participate in the marathon to challenge themselves.
很多人参加马拉松是为了挑战自己。
3. She finished the marathon in under four hours.
她在四个小时内完成了马拉松。