keystones
n. 基础，主旨；基本原则；楔石；拱顶石
复数 keystones
例句
The research keystones of copper electroless plating were presented.
提出了化学镀铜今后的研究重点。
The Work Deletion and Keystones of Short Message Chicane Casesin Our Country.
我国应对短信诈骗案件的工作缺失及重点。
One of the keystones of the paper is image fusion algorithm based on pixel level and feature level.
本文研究的一个重点是像素级和特征级的图像融合算法。
