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
I've got six months to go until graduation.
我还有六个月就毕业了。
Nothing is stolen without hands.
无风不起浪。
I am looking forward to your visit next week.
我期待着你下周来访。