The phrase "are not only needed" is correct and usable in written English.
It can be used to emphasize that something is required in addition to other things, often in a comparative context.
Example: "Resources are not only needed for immediate relief but also for long-term recovery efforts."
Alternatives: "are essential as well" or "are required in addition".
Such techniques are not only needed to obtain proper results; they are also critical for dealing with the growing body of information from structural genomics.
In particular, it implies that long-term interventions are not only needed for the extreme poor, but also for an important share of those in moderate poverty.
"Identifying innovative and ground breaking solutions to the problems of antimicrobial resistance are not only needed but are essential," said Nicholas Brown, president of the British Society for Antimicrobial Chemotherapy, in a statement issued today.
In this scenario, HAIs educational programs are not only needed, but also very likely to be welcomed.
Scoring systems are not only needed to evaluate the severity of skin involvement but may also provide an alternate way to monitor systemic disease.
In this model, it is assumed that goods are not only needed to perform the different activities, but are also the main source of expenses.
"The concept in Florida has proven to be not only needed, but viable," said Michael R. Goldstein, an environmental lawyer in Florida who specializes in brownfield redevelopment.
We have recently discovered that the hippocampus is not only needed to reimagine the past, but also to imagine the future.
An enormous amount of capacity was not only needed to create the data entry instruments, but also to conduct numerous meetings regarding variables and coding, data collection and notation methods, as well as score computation.
Fast forward 17 years later and we now know a company website is not only needed -- it's imperative.
