density functional theory.的用法和樣例：
例句
- A new density functional approach for calculations of large systems is presented.
提出一種新的對大體系進行分區密度泛函計算的方法。 - In this paper, the foundation of DFT and the progress we achieved in studies on the bounds for density functions in DFT were briefly introduced.
本文簡要介紹密度泛函理論的基礎和近幾年作者在密度泛函理論中的界限研究所取得的進展。
