reel off，俚语，一口气说出 用法，reel off something 或 reel something off 英解：to say a list of things quickly and easily 例句： He reeled off the names and ages of his seven grandchildren.
challenge 英[ˈtʃæləndʒ] 美[ˈtʃæləndʒ] n. 挑战; 质疑; 盘问; 怀疑; vt. 质疑; 向…挑战; vi. 提出挑战，要求竞赛（或竞争）; 驳斥; [例句]I like a big challenge and they don't come much bigger than this我喜欢大的挑战，而所有挑战中再没有比这更大的了。
