Sentence examples for source was difficult from inspiring English sources

Second, the exact date of exposure to a known infectious source was difficult to trace.

Localization of this deep source was difficult as none of the configurations were able to recover accurately the deeper aspects of the source.

The significance of oil as a world energy source is difficult to overdramatize.

This approach is beneficial if the source is difficult to suspend, or if it contains nonlinear structural elements.

Single energy storage source is difficult to satisfy the hybrid vehicle's requirements for both energy density and power density.

It is concluded that during high solar/interplanetary activity intervals such as this one, the exact solar source is difficult to identify.

However, the EO process is complex and residual gas is toxic for tissue and cells whereas radioactive source is difficult to access for GI and therefore both methods are not practical for dental offices and laboratories.

Although in general sequentially grouping sounds from the same source is difficult, in music, a good heuristic is to apply the "no-crossing" rule, which states that pitches of different instrument lines tend not to cross each other.

It can be deadly, and identifying its source is difficult.

In general, detection of a food source is difficult because the incubation period for hepatitis A is long (average 4 weeks); therefore, responses to food-consumption questionnaires, if administered, might be unreliable because of recall bias.

These studies are complicated by three important factors: there may be several sources of a contaminant; the emission rate from each source is difficult to precisely determine; and the regulatory models do not typically include provisions for the degradation and deposition of gases in transport downwind from the source.