The phrase "are commonly less" is correct and usable in written English.
It can be used when comparing the frequency or degree of something in relation to another subject.
Example: "In many cases, these products are commonly less effective than their more expensive counterparts."
Alternatives: "are often lower" or "tend to be less".
Concentration times in small and medium-sized basins (∼10 1000 km2) are commonly less than 24 h.
This might have influenced the outcome: surveillance HAI definitions are commonly less specific than the clinical diagnosis [8],[8]].
Facultative enteric bacteria such as enterococci and escherichiae are commonly less susceptible to disinfectants than anaerobic taxa [16], [23], which are seen as the main causative agents of peri-implant disease [15].
This might have influenced the outcome: surveillance HAI definitions are commonly less specific than the clinical diagnosis [ 8, 12].
Male hybrid mice are commonly less fertile than non-hybrids; this acts as a barrier to reproductive success that helps to maintain the separation between the two subspecies.
Although Stochastic Interacting Systems are commonly less sophisticated than the QS model, they may provide insights analogous to those branching process theory provides for population growth models.
Because of the numerous branching that occurs within most lineages, the number of formal taxonomic levels available is commonly less than the number of branching events.
California Current, surface oceanic current, southward-flowing continuation of the Aleutian Current along the west coast of North America between latitudes 48° N and 23° N. The California Current's surface velocity is commonly less than 10 in.
Finally, MRI is commonly less available in the geographic regions where TA is most prevalent [18].
The radiation dose of this imaging technique is commonly less than 1 mSv in young children [9].
In addition, this approach is impractical at fields higher than 300 MHz, in which the required decoupling capacitance is commonly less than 0.5 pF.
