The phrase "are only valuable when" is correct and usable in written English.
It can be used to indicate that something has worth or significance only under certain conditions or circumstances.
Example: "These skills are only valuable when applied in real-world situations."
Alternatives: "hold value only if" or "are meaningful solely when".
As long as we continue to drool over images of girls under sixteen, we reinforce the assumption that women are only valuable when they are young, and that these girls are fair game for sexualisation.
Therefore, our results and conclusions are only valuable when considering the present clinical algorithm.
If we continue to be erased in the second half of our lives, we will remain stuck in a perpetual cycle of conflating youth with greater social relevance in the first half of our lives, and the patriarchal axiom that women are only valuable when they are young, hot and fertile will continue unchallenged.
A simulation study could not stand in isolation as the only evaluation of an assessment method and are only valuable when knowledge of true disease status cannot be attained.
However, that speed is only valuable when teams leave him in one-on-one situations like the Denver Broncos did in the Divisional round.
It is only valuable when it can be the most efficient channel for customers to actually engage via a question and answer kind of way.
As we marketers know, however, the product is only valuable when it delivers on its brand promise.
Hydatic serology is only valuable when it is positive, negative serologic test does not exclude the diagnosis.
However, this insight is only valuable when it actually improves decision making on whether to adopt the experimental intervention immediately, to adopt it while also requiring additional evidence collection, to adopt it only in research settings in order to collect more evidence, or to reject the experimental intervention [ 28].
And, of course, reserves are only valuable if they are used when needed.
"When I'm teaching this," Rayor said, "I'm teaching about Peter Witt's experiments, which are only valuable in the context of their innate web-building behaviors".
