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
Robbie, will you help me serve? Robbie
你能帮帮我吗？
That means the child is already one year older.
那意 味着孩子又长大了一岁。
That doesn't sound like modern printing.
这听起来不象是现代印刷术呀。