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
You want Michigan to win.
你希望Michigan队赢球。
I don't know what I should have done without your help.
要不是您的帮助，我真不知道该怎么办。
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因为那时英国人害怕入侵，隧道早已建成了。