Sentence examples for difficult to observe from inspiring English sources

These prohibitions are difficult to observe.

Is it difficult to observe Ramadan without his family nearby?

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

The birds are shy about the nest and hence difficult to observe.

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

Stratification will be difficult to observe directly.

This process is fast and therefore is difficult to observe.

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

The Pbase-PS structure is more difficult to observe.

Nucleation remains difficult to observe, even with current TEM technology.

However, it is difficult to observe and describe accurately by mathematical methods.