Sentence examples for problematic and expensive from inspiring English sources

But "preventing traction sand" from reaching waterways is difficult, said Mr. Roberts, of the E.P.A., who added, "Restoration will be even more technically problematic and expensive".

Although early reports suggested that VSA was problematic and expensive, through the application of more logical process configurations that are appropriately coupled to the composition of the feed and product gas streams, we can now refute this early assertion.

In view of the fact that experiments are often time-consuming and, in some cases, meteorologically both problematic and expensive, intensive work has been done over the past few years on the development of mathematical approaches and procedures to evaluate real thermal and moisture transfer processes.

Moreover, chemical synthesis of the majority of isoprenoids is problematic and expensive due to the complexity of their molecules.

Most disappointing was the fact that many troublesome gaps in the Sanger-derived assemblies, which had been extremely problematic (and expensive) to close during human-grade sequence finishing, remained unchanged following the incorporation of Velvet-assembled contigs.

There is no need to travel by car to reach interesting cities in Lombardy and the Veneto, where finding parking is problematic and can be expensive.

These bans, usually enacted at the city or county level, are damned as bad for families, problematic for civil liberties, and expensive to enforce, without increasing public safety.

The committee concluded that relocation would be "highly problematic, very expensive, and fraught with political difficulties".

Because access to human tissues and consistent extraction of the Sa antigen from tissues proved problematic, and commercial human vimentin is very expensive, we developed standardized and less expensive assays.

However, access to spaceflight opportunities is problematic, expensive and scientifically constrained.

They reflect a very complex cellular network rather than the particular influence of a certain cell type, are time-consuming and expensive, and can be ethically problematic.