power density profile的用法和樣例：
例句
- If, however, the void has a more realistic, smooth density profile, then a distinct observational signature presents itself.
然而，如果這種空洞有一個更合理的更平滑的密度分佈，那麼就會有一個顯著的觀察特點出現了。 - 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。
