When there is doubt about results, additional, but expensive techniques, such as the radioimmune precipitation assay, can also be used.

It can be a more expensive technique due to customization and lack of an economy of scale.

Microalgae do not settle by gravity, therefore expensive harvesting techniques must be applied.

This is the least expensive technique for solving the problem, the agency said.

This type of whitening is the most expensive technique.

For years there have been clever but expensive techniques to get more precise readings.

Hollywood often leaned on this less expensive technique for some of its movie trailers in the early era.

There are also much more complicated and expensive techniques for interviewing candidates.

This serious health danger could be avoided by using more appropriate but expensive techniques for handling radioactive materials.

The common, but expensive, technique is for the network owner to issue known, trusted, unchangeable hardware to users.