Knock against
（使）撞击, 击打; 偶然碰到; 磕碰
🧩 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;
🗣️ 情景例句
Your family or the public?
你的家人还是公众
If you want to be healthy, you have to stop smoking a pipe.
如果你要身体健康的话，必须停止抽烟斗。
I'm sorry to hear that.
真遗憾。