"this partially explains" is correct and usable in written English.
You can use it to acknowledge that something has been explained, but that more may need to be discussed. For example: "This partially explains the recent rise in unemployment figures, but there are a number of other factors at play."
This partially explains such a tough decision with regard to Russia's Athletics Federation.
This partially explains the observed vigorous dynamic behaviour of roofs before failure in buildings with a windward opening during the passage of tropical cyclones.
This partially explains why some people will get no effect at all while others end up in the hospital with severe side effects from the same medication at the same dose.
Also significant is the finding that the maximum sub-surface shear stress, which is generated by particle impacts, is close to the coating substrate interface: this partially explains the rapid failure of the coating.
When the émigrés who had fled from the effects of the Revolution trickled back to France, they brought with them some of the cultural colouring acquired abroad (mainly in Britain and Germany), and this partially explains the paradox of aristocratic and politically conservative writers fostering new approaches to literature.
This partially explains why there is always an active transaction market for CRE.
As the bank observes, this partially explained the decline in district manufac turing employment in recent months.
This partially explained the fact that the anodized specimens adsorbed higher proteins than the non-anodized specimens.
This confusion partially explains the historically low turnout in the first round of 49%.
This result partially explains the normoglycemic phenotype of SERCA3 KO mice (Arredouani et al. 2002).
But this only partially explains the complex situation.
