But the continuing fragmentation may be preventing potential transplant matches.
Pressure from the debris may be preventing a hemorrhage.
The Redskins' defense may be preventing big plays, but its offense is not producing them.
But one thing may be preventing landlords from building even more bike rooms: showers.
If you put one of them in jail, you may be preventing 100 or 150 thefts a year".
What may be preventing that now, in NBC's case anyway, is the lackluster performance of that network's prime-time schedule.
Despite divided opinion about the merits, foreign investment may be preventing deeper troubles by infusing hard-luck companies with cash and keeping some in business.
Unfortunately for Mr. Schwartz, the main challenge may be preventing Loral from disappearing as it tries to reorganize under Chapter 11 bankruptcy protection.
Also, opponents say, women opposed to abortion who believe that pregnancy begins at fertilization may not realize they may be preventing an egg from implanting.
"The inventory buffer may be preventing full price recovery and … the market is rightly nervous about the sustainability of outages," said Morgan Stanley.
Functioning as an anti-apoptosis gene, it may be preventing fungal-induced cell death and contributing to the maintenance of organelle homeostasis.
