The phrase "a unique possibility to" is correct and usable in written English.
It can be used when discussing an opportunity or chance that is distinct or one-of-a-kind.
Example: "This program offers a unique possibility to enhance your skills in a supportive environment."
Alternatives: "a rare opportunity to" or "an exclusive chance to".
However, data on mental distress status of both spouses give a unique possibility to take one step further than what has been possible in most previous studies.
This is a unique possibility to learn from complementary expertise at the various centres.
Twin designs offer a unique possibility to take genetic and shared environmental factors into account.
Sediment cores from Kriegers Flak in the southwestern Baltic Sea provide a unique possibility to study the Middle Weichselian history of the Baltic Basin.
Each strong earthquake represents a unique possibility to study ionospheric response to the relatively well-known source and thus to better understand the coupling between the solid Earth, troposphere, and upper atmosphere and ionosphere.
Combining volumetric observations of ionospheric velocity made using EISCAT_3D with simultaneous observations of thermospheric neutral wind, using e.g. a scanning Doppler imager, will provide a unique possibility to measure the density of the thermosphere in the E and F regions (e.g. Kosch et al. 2011a and references therein).
The Dutch 'Project On Preterm and Small for gestational age infants' (POPS) nationwide population based cohort of adults who were born VP or with a VLBW in 1983 [ 12], provides an unique possibility to study the long term effects of VP birth or VLBW on HRQoL of adults.
The ITER TFMC experiment offers an unique possibility to check this model.
The analysis of the health condition of a Renaissance Italian Dome gave us the unique possibility to study some interesting, ancient tie-rods.
The ability of Cryptotermes secundus workers to develop into neotenic replacement reproductives after a single moult offers the unique possibility to study differential gene expression during caste differentiation.
Positron emission tomography (PET) imaging offers the unique possibility to evaluate brain inflammation longitudinally in a non-invasive translational manner.
