Sentence examples for was difficult to observe from inspiring English sources

Notably, 'initiate breastfeeding within one hour' was difficult to observe since the observer did not stay continuously with the same woman for the whole hour after birth if there were other births occurring to observe.

Below the roof, the permeable zone was difficult to observe.

Transnasal fiberscopy indicated adenoid vegetation, pharyngolaryngeal narrowing, and favorable glottic mobility; however, the subglottic area was difficult to observe (Fig. 2a, b).

Notice that, from SEM or TEM images in Figs. 2 and 4, it was difficult to observe any planar nanostructures as shown in Fig. 1.

The final stage of oocyte maturation was difficult to observe because of the shrinkage and distortion of these cells during normal tissue processing.

At −1.6 V, meanwhile, it was difficult to observe the ZnO XRD peaks since the ZnO was not formed as shown in Figure 4a.

These prohibitions are difficult to observe.

A contingent of the international news media came to Kabul to cover the proceedings, which were difficult to observe.

Like many other geologic features concealed beneath the earth, caves are difficult to observe.

This female finally got into a posture that enabled copulation, a process that is as strange in spiders as it is difficult to observe.

Because the Hawking emissions would be obscured by more powerful radiation sources in space, it would be difficult to observe with astronomical instruments.