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
He has no consideration for others.
他不顾及别人。
Wit without learning is like a tree without fruit.
仅有机智而无真才实学，犹如一棵大树不结果。
What!It's only eight fifteen.
什么！现在只有8点15分。