Sentence examples for difficult to obtain an from inspiring English sources

However, a critical limitation is that it is extremely difficult to obtain an effective causal structure from datasets.

Most apartments are now sold by word of mouth, and this practice makes it difficult to obtain an apartment on the open market.

Because it is difficult to obtain an adequate amount of saliva from mice under normal conditions, some experiments used pilocarpine for parasympathetic stimulation and norepinephrine for sympathetic stimulation13.

When field data are difficult to obtain, an expert knowledge-based model can be used as a replacement for the data-based methods.

It is always difficult to obtain an accurate flux distribution due to the insufficiencies, the measurement errors of the experimental data and the redundancy of EMs.

However, it is difficult to obtain an autogenic corneal stromal replacement that is composed of transparent, tough, and thick collagen constructs by current cell culture-based tissue engineering.

In practice, it is difficult to obtain a-priori knowledge of the full statistics of measurement errors.

Miami has found it difficult to obtain a home sports arena.

And in Mexico, it's extremely difficult to obtain a new tourist visa.

It is also difficult to obtain a clear sonogram when the mother has an abundance of body fat.

"Importation and operation of satellite telephones inside Syria require government approval, which is difficult to obtain," a Unicef spokesman said.