Helmholtz theorem

例句：

1. 1. The Helmholtz theorem states that the speed of sound in a medium is directly proportional to its density and temperature.
   赫尔姆霍茨定理指出，声音在介质中的传播速度与介质的密度和温度成正比。
2. 2. During the experiment, we observed that the Helmholtz theorem applies to the behavior of gases under pressure.
   实验中，我们观察到赫尔姆霍茨定理适用于气体在压力下的行为。
3. 3. The Helmholtz theorem has been extensively studied in various fields of science, including acoustics and thermodynamics.
   赫尔姆霍茨定理在声学和热力学等许多科学领域都进行了深入研究。