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
We love having you here,
我们喜欢你们住这里，
Go along the corridor and it's on your right side.
沿着走廊走，在你右手边。
Rex soon became an expert at opening the gate.
雷克斯很快成了开门的专家。