The phrase "are important knowledge" is not correct in standard English.
It should be rephrased to convey the intended meaning more clearly, as "knowledge" is an uncountable noun and cannot be used in this way.
Example: "These concepts are important pieces of knowledge for understanding the subject."
Alternatives: "are crucial insights" or "are essential information."
Time and temporal relations are important knowledge elements.
Cohen et al. (2002) found that publications are important knowledge channels from the public sector to the manufacturing sector.
The duration of untreated depression (DUD) might have a substantial impact on the clinical outcomes; however, there are important knowledge gaps including the effects on disability and potential differences between first-episode and recurrent episodes of depression.
Whether histamine potentially contributes to the acid base balance and the induction of heart muscle contractile forces as the consequence of adenosine-induced low energy, reducing cAMP accumulation and ischemic heart, and/or interactions with norepinephrine and Ca+2 flux are important knowledge gaps that deserve further studies.
There are important knowledge gaps that need urgent action, in order to prepare the sub-continent for the anticipated local surge in neurodegenerative diseases.
There are important knowledge gaps regarding the population levels of lipid variables and frequency of non-optimal levels in populations within Africa.
That's important knowledge".
Living with Charles, however, differed from the average upbringing; it consisted of what he felt was important, knowledge and anything that strayed from the norm.
February is LGBT History Month in the UK and it's important: knowledge of any history directs political energy and shapes one's sense of identity.
For health policy-makers, all of this is important knowledge.
Knowing what works and what does not and what will be counterproductive is important knowledge indeed.
