Quickly, riders began competing 24 hours a day, limited only by their ability to stay awake.

Sales were limited only by their ability to manufacture enough to meet demand.

Searches are limited only by the user's ability to come up with questions.

The distance they could advance was still limited by their ability to supply and communicate.

Dosages are limited by the patient's ability to tolerate side effects.

While expressions like these are of great theoretical importance their practical use is limited by our ability to factor numbers.

And the city's ability to pay is limited only by its ability to tax.

Its prevalence is only limited by the physician's ability to identify the disease.

Long hours of labor lay ahead that were limited only by their ability to stand on their feet.

"You're limited, however, by your financial ability to exercise sovereignty."