如何使用密度核估计的孤立点检测？
为了简便，研究人员常常使用比重而不使用密度。
To make this simpler, research workers often use specific gravity instead of density.
之后，科研人员使用密度泛函理论设计分子，来满足这些条件。
The researchers then used density functional theory to design molecules in which these conditions would be satisfied.
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