5.The two teams are locked in a duel for first place.
两个队为夺第一名打得难解难分。
6."Mors et vita, duello conflixere mirando: dux vitae mortuus, regnat vivus –Death and life have come face to face in a tremendous duel: the Lord of life was dead, but now he lives triumphant.
7.He won a tense duel over first-time participant Sidharth Chand, 12, of Bloomfield Hills, Michigan, who finally stumbled on "prosopopoeia," a word describing a type of figure of speech.