Knudsen diffusion
[化] 克努森扩散
🧩 词语组成解析
n. 努森（M·H·C, 1871-1949, 丹麦物理学家）
🗣️ 情景例句
He was more than helpful.
他不仅仅是帮忙。
I was in the hospital for several weeks.
我在医院里住了几个星期了。
How do they compare to last year's?
与去年的相比怎么样。