Let's make a historical comparison.

让我们做一个历史的比较。

youdao

But the branch of historical linguistics, involves the comparison of several different languages, or the comparison of different stages of a single language.

但历史语言学的一个分支，涉及到几种不同语言的比较，或同一种语言不同阶段的比较。

youdao

The firm analyses historical and online data to provide a basis for comparison, enabling its algorithms to detect things that are about to go wrong.

公司历年记录的分析数据和目前的在线即时数据提供了进行比较计算的基础，使系统能够依据其算法检测到供水管网可能要出现的故障。

youdao

As a further historical comparison, one in four Americans did not have jobs during the Great Depression in the 1930s, so the unemployment rate then hit 25%.

BBC: Putting the job losses in context

To him, a more appropriate historical comparison is between Obama and Liberal Party politicians, including HH Asquith.

BBC: Is Barack Obama a Tory?

This would measure the total amount of debt that can only be paid back by tax revenue or selling government assets, and so would be a more apples-to-apples comparison with historical Treasury debt, govt debt in other countries, etc.

FORBES: Monetary Watch February 2011: Obama's budget, the GOP and its implications for US inflation