Knock indicator
[化] 爆震器
🧩 词语组成解析
knock
[nɑk]
n. 短促的敲打（声）;爆震声;敲击声;敲门（或窗等）声;
vi. 猛烈敲击;与某物相撞;撞到了桌子;
vt. （心）怦怦跳;把…撞击成（某种状态）;批评;
indicator
['ɪndɪketɚ]
n. 指示器;[化]指示剂;指示者;
🗣️ 情景例句
Oh, I like it.
噢， 我喜欢哑谜。
When two ride on one horse, one must sit behind.
两人共骑一匹马，总有一个背后跨。
They must keep their hands behind their backs.
他们得一直将手放在背后。