Documents are one datum typically shoe-horned into rows and columns; irregular data is a mismatch for RDBMSs, as well.

文档是一种通常按行和列填充的数据，不规则的数据也不适合于 RDBMS。

youdao

I have not experimented with words having irregular plurals; words like datum and data might trip up Rails.

我没有使用不规则复数单词的经验；datum 和 data 等单词可能会令 Rails 出现问题。

youdao

Change is outside the list of engineering quantity; supplied engineering geology datum and hydro-geological data don't agree with practical condition.

不属于工程量清单范围内的变化，提供的工程地质资料、水文地质资料与实际不符而增加的工程量。

youdao