Challenge-response
挑战-应答
🧩 词语组成解析
challenge
['tʃælɪndʒ]
n. 挑战;盘问;质疑;怀疑;
vt. 质疑;向…挑战;
vi. 提出挑战，要求竞赛（或竞争）;驳斥;
🗣️ 情景例句
Thanks.
谢谢。
No sooner said than done.
言而必行。
Jeremy asked her why this was so and she told him that she did not like to see so many people laughing at him!
杰里米问他为何不喜欢，她说她不愿意看到那么多的人嘲笑他！