Those should be improved.

这些需要提高。

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They demanded that working condition should be improved.

他们要求改善工作条件。

youdao

Firstly, the quality of the dishes should be improved.

首先，饭菜质量应当提高。

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What do you think is one thing that should be improved in London?

你觉得伦敦在哪个地方还需要改进？

伦敦的现代化 - SpeakingMax英语口语达人

Mr Buckle believes police presence should be improved to curb the rise in crime.

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Real leaders are open to the possibility that most things not only can, but should be improved upon.

FORBES: The Power Of 'What If'

"We have tested the first prediction of the hypothesis - that handling should be improved, " Dr Smulders said.

BBC: Science puts wrinkled fingers to the test