Providing an on-board power supply is difficult, however, so he is investigating the use of external magnetic fields to power the device.An alternative approach is not to imitate nature, but to harness it by hitching a ride with a bacterium.
Their supply is difficult.
Production exceeds consumption in both commodities placing real physical constraints because storage of excess supply is difficult to find.
In solid tumors, maintaining nutrient supply is difficult, and autophagy serves as an adaptive survival mechanism for the adverse nutrient supply circumstances.
Determining the complex relationship between distance from the Couffo River and the numbers of cases and level of protection of water supply is difficult.
The true scale of the impact of these findings on future effective physician supply is difficult to determine with currently available evidence, given that few studies looked at trends over time, and results from those that did are inconsistent.
Because the affected area is extremely remote, distributing the relief supplies was difficult.
Cooperatives were heavily taxed, supplies were difficult to procure, and the public was often hostile.
Hospital supplies are difficult to find and staff members have no money to feed their patients, he said.
But supplies were difficult to produce, and the market price was beyond the means of most families.
In fact, art supplies are difficult to obtain.
