Knock indicator
[化] 爆震器
?? 詞語組成解析
knock
[nɑk]
n. 短促的敲打（聲）;爆震聲;敲擊聲;敲門（或窗等）聲;
vi. 猛烈敲擊;與某物相撞;撞到了桌子;
vt. （心）怦怦跳;把…撞擊成（某種狀態）;批評;
indicator
['?nd?ket?]
n. 指示器;[化]指示劑;指示者;
??? 情景例句
you'll have it.
那你就大功告成了。
The shore man is carrying a heavy load.
碼頭工人在搬運沉重的東西。
Sometimes they eat it in the park or on the road. This take-away food is very popular.
有時他們在公園里或路上食用。這種方便食品頗受歡迎。