"two alternative explanations" is a grammatically correct and commonly used phrase in written English.
Example: The results of the study were inconclusive, leaving us with two alternative explanations for the outcome.
Currently there are two alternative explanations.
That increased metabolism would, in turn, generate more oxygen-rich molecules of a type known as free radicals, which are potent inducers of mutation.To support this idea, the team had to eliminate the two alternative explanations.
Two alternative explanations have been suggested.
This allows for two alternative explanations.
These two alternative explanations are nowfurther explored.
The team considered two alternative explanations for the sponging behavior: Either it was genetically determined, or mothers somehow passed the tradition on to their daughters.
The six-page white paper, entitled Iraqi Mobile Biological Warfare Production Plants, contains a description of the three trailer units found so far in Iraq and dismisses at least three alternative explanations for their use, an official said yesterday.
Listing eight alternative explanations for Obama's gains after the storm hit – including recent encouraging economic news – Silver concluded that the gains were "over-determined": a lot of variables might have contributed to the one result.
We tested three alternative explanations for the negative association between pudus and dogs that were not supported.
No fewer than ten alternative explanations of the Princeton result were offered, and not all of them were very plausible.
1215 1279) discussed three alternative explanations of the motions of the celestial spheres, rejecting the views that celestial bodies are animated and are moved by their own spirits or souls, or that the celestial bodies are moved by angelic spirits, which govern and move them.
