1、The helicity of a particle refers to its intrinsic angular momentum.
颗粒的旋度是指其固有的角动量。

2、The helicity of a molecule determines its chirality.
分子的旋度决定其手性。

3、The concept of helicity is important in the study of fluid dynamics and magnetic fields.
旋度的概念在流体动力学和磁场研究中很重要。