My advice is to think carefully at the design stage about whether a singular datum might have siblings later on.

我的建议是，在设计阶段，就单个数据是否在以后需要多个兄弟数据，要仔细考虑。

youdao

The final ERD (entity relationship model diagram) and system datum dictionary are given through data sheets normalization during logic design and physical design.

在逻辑设计与物理设计过程中通过数据规范化后得出最终的ER模型图并给出系统数据字典。

youdao

Firstly, based on the a lot of literature datum, the current situation of the coarse materials design theory is analyzed, their characteristics and the existing problems are pointed out.

本文首先查阅了大量文献资料，在此基础上分析了粗粒料的设计理论方法的现状，指出了它们各自的特点和存在的问题。

youdao