不定式形式是 to beat，例如：
1、Their recent wins have proved they're still the ones to beat.他们最近的胜利已证明，他们仍然是最难打败的队。
2、It's extremely difficult to beat a seeded player.打败种子选手格外不容易。
3、We were up and off early to beat the heat.我们很早就起床出发了，趁天还没热。
