1. Though he was technically a prizefighter, Mendoza did much to change crude prizefighting into a sport, for he brought science to the game.
    虽然门多萨严格来讲不过是个职业拳击手，但在把这种粗野的拳击变成一种体育运动方面，他作出了重大贡献。是他把科学引进了这项运动。

2. However, boxing was very crude, for there were no rules and a prizefighter could be seriously injured or even killed during a match.
    不过，拳击是十分野蛮的，因为当时没有任何比赛规则，职业拳击手有可能在比赛中受重伤，甚至丧命。