The phrase "it could be speculated" is grammatically correct and can be used in written English.
Example: It could be speculated that the recent economic downturn is due to the increase in global competition.
It could be speculated that the complexes in plasma are not necessarily related to those detected in tumor tissue.
Thus, it could be speculated whether PACAP38 elicits its effect on mast cells through a distinct target from the PAC1 receptor.
Hence, it could be speculated that PACAP38 upregulates intracellular cAMP in trigeminal nociceptors following PAC1 receptor activation.
It could be speculated that there are differences between the fates of the injected nSP70 and nSP70-C.
Considering the high homolog between TCD10 and PGR3, it could be speculated that TCD10 may have similar three functions.
Hence, it could be speculated that tumours with higher cell density and/or mitochondria would enhance more markedly on MEMRI.
Moreover, given the effects of BFB training on patients' coping strategies it could be speculated that BFB acted as a general arousal control strategy [44].
Thus, it could be speculated that the FF of the Si heterojunction solar cell strongly depends on the conductivity of the P-doped Si-NCs/SiN x film.
Hence, it could be speculated that the low-frequency dependence was dominated by an interacting charge carrier system, which was similar to an ionic conductor.
It could be speculated that the division into bins maximized separation between amino acids that only differ slightly on a continuous scale explaining the very different behavior.
From the TVC results, it could be speculated that ZrO2 coating worked out exhibited better antibacterial activity only against E.coli and no activity for S.aureus.
