Helmholtz equation
[化] 亥姆霍兹方程
🧩 词语组成解析
赫尔姆霍茨(①姓氏 ②Hermann Ludwig Ferdinand von, 1821-1894, 德国生理学家, 物理学家及解剖学家)
🗣️ 情景例句
Concerned about whom?
为谁担心
It's a few minutes after two.
两点过几分。
He was just able to lie down on the ground, but could not stand up.
他只能躺在地上，但不能站起来。