Sentence examples for are three substantial challenges from inspiring English sources

There are three substantial challenges in quantitatively characterizing reservoir heterogeneity.

Behind the change are two substantial changes in society.

There are two big challenges.

There are two major challenges.

But there are two challenges.

There are two challenges.

However, across all six service areas there were substantial challenges in relation to information, which can be grouped into two main types.

However, there are substantial challenges with the pharmacokinetics of rapamycin due to its lipophilic chemistry [32].

That was one very substantial "instead".

There were two challenges.

There could be two challenges.