The phrase "are rather significant" is correct and usable in written English.
It can be used to indicate that something holds considerable importance or value in a given context.
Example: "The results of the study are rather significant, suggesting a strong correlation between the variables."
Alternatives: "are quite important" or "are fairly substantial."
Even though the penetrant concentrations are rather significant at some of the conditions considered, no evidence is observed for phenomena such as multicomponent coupling that would require a model more complex than the binary form of Fick's law.
Those are rather significant price cuts from the original unlimited smartphone plans, which offer 2GB and 5GB of data for $79.99 and $89.99 respectively.
For example, a feature for OCR should be insensitive to shape variations of "1" even though they are rather significant.
It is rather significant for simulated flow and more limited on overland water depth for these rainfall events.
This is rather significant for practical engineering, as the incident wavelength varies over a wide range in practice.
These differences can be rather significant towards the real cost of a project and selection of the right arrangements.
Yaw stability control (YSC) is rather significant in a vehicle lateral motion, since it can considerably reduce casualties caused by vehicle instability.
An important increase of crystallinity has been observed in the final oxidized samples, indicating that the extent of degradation is rather significant.
With only a few minutes to play and the ball in the hands of your offense, an 11 percent dip is rather significant.
"It's rather significant that there will now be available an over-the-counter product that we do have data on, that we know is efficacious and what the safety profile is," Dr. Rosebraugh said.
The results of these 'nonisothermal' experiments are presented; they suggest that the contribution of the gas-phase reactions is rather significant and that the C2+ selectivity is improved by an increase of the gas-phase temperature up to 850°C.
