There should have been a fourth night-light.

应该有第四盏夜灯。

youdao

The ship ran aground where there should have been a depth of 35 ft.

这条船在本应该有35英尺深的地方搁浅了。

《柯林斯英汉双解大词典》

There should have been decided, beforehand, what constitutes acceptable thresholds for defect levels and other metrics.

预先应该已经确定了，构成缺陷级别和其他量度的可接收的门限是什么。

youdao

He says there should have been an election to re-establish legitimate authority, which was overthrown during the first Soviet occupation in 1940.

VOA: standard.2009.12.25

So, you should know that there's four radial nodes, right, we have 5 minus 1 minus l -- is there a question?

你们要记住这里有四个节点，对吧，５减去１减去ｌ，有问题吗？

麻省理工公开课 - 化学原理课程节选

But you should see that there are four radial nodes here since we have a 5 s orbital.

但你们应该知道,这里有４个节点，因为它是５ｓ轨道。

麻省理工公开课 - 化学原理课程节选

With that last comment there should have maybe been a chuckle in all of this too.

FORBES: Journalists and Statistics: Paying Attention to the Data of a New Media World

Do you think there should have been more conditions laid down of that type, David Ervine?

BBC: Northern Ireland

Republicans have hinted that there should have been a big red flag next to the suspect's name.

CNN: The return of terror politics