poweer-density distribution的用法和樣例：
例句
- This paper presents a new process of axial modification for carbonized gears, and investigates the current density distribution in gear teeth.
敘述了硬齒面齒輪電化學齒端修形原理，對齒面上沿齒向的電流密度分佈進行了分析。 - A new scheme of tracer selection is developed to improve the quality and the density of cloud motion winds.
文中設計了一種示蹤雲選取演算法，以改善雲跡風的質量和密度分佈。
