The phrase "a hard technique" is correct and usable in written English.
It can be used to describe a technique that is difficult to master or implement.
Example: "Learning to play the violin is a hard technique that requires years of practice and dedication."
Alternatives: "a challenging technique" or "a difficult technique".
Singing and beatboxing at the same time This isn't a very hard technique,once you get to know the basic principles.
Although much is known about EI fragmentation, it is a hard ionization technique that can result in very complex rearrangements and fragmentation events [187] which are hard to predict.
It should attract a bit of backlash as well, as clogging up the interface with a dozen of songs when you only bought one song from one artist is a lot of cluster and a hard selling technique.
Therefore, this method is considered a hard ionization technique.
Typically the use of a hard ionization technique such as EI is not suitable for OGSR; however in this study only propellant additives were analysed, not the thermally labile explosives present in OGSR.
Given the available anatomical evidence, applying a hard-clustering technique in the insula would be undesirable, as it would, by definition, split the insula in discrete clusters without first assessing whether the data indeed suggest the presence of homogeneous clusters separated by sudden changes of connectivity.
Efforts to improve DEM performance in replicating known hydrology have included a variety of soft (i.e. algorithm-based approaches) and hard techniques, such as "Stream burning" or "surface reconditioning" (e.g. Agree or ANUDEM).
Thicker, denser padding works well for "hard" techniques such as sports massage.
This was the hardest technique to master: I'd always thought backcombing was invented around the time Tina Turner first topped the charts, but it turns out to be vital for creating the volume and solidity to pull off a wartime hairdo.
