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
I know it!
我知道！
If you would have a thing well done, do it yourself.
如要是情做得好，你须亲自动手搞。
I hope you are well. Thank you for your last letter.
愿你身体健康。感谢你上次来信。