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
The book is above me.
这本书我读不懂。
Do not speak of your happiness to one less fortunate than yourself.
不要向不如你幸运的人述说你的幸福。
What do you do?
你做什么工作？