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
Fortunately, I found his house at once.
很幸运地，我立刻找到他家。
I ought to see a doctoe at once.
我应该立刻去看医生。
Yes, here you are.Thanks very much!
给你。太谢谢你了！