The phrase "are often sustained" is correct and usable in written English.
It can be used to describe something that is frequently maintained or continued over a period of time.
Example: "The efforts to improve community health are often sustained by local organizations and volunteers."
Alternatives: "are frequently maintained" or "are commonly upheld".
Metal phosphonates are often sustained by strong bonds that render them very stable materials.
During competitive hockey, on-ice heart rates (HR) are often sustained as high as 85%% max and have been reported to peak >90%% [4].
A uniform meritocratic approach does not take these differences into account and as a result these differences are often sustained or enlarged (Broek 2009; Bourdieu and Passeron 1990; Meerman et al. 2009).
71 Asthma exacerbations are often sustained in the elderly by a variety of nonallergenic triggers, such as viral infections, pollutants, and drugs.
We selected a time frame of 30 min because responses to leopard presence are often sustained over a longer time frame, and this was the maximum amount of time possible to follow all subjects.
Unshelled cephalopods have the extraordinary ability to change their body color pattern in less than a second for camouflage and intraspecies communication, and the color patterning is often sustained for seconds or minutes [1].
There were significantly more genes responsive to HRG, and although the inductions were generally weaker, their expressions were often sustained.
The self-completion module of the 2001 British Crime Survey showed that injuries were often sustained as a result of domestic violence, especially among women.
Although HRG-induced expression was generally of a lower magnitude than for EGF, it was often sustained compared to EGF, consistent with our previous finding that HRG-dependent mitogenic signalling is sustained in these cells [ 32].
Should we, for example, be tying executive rewards to short-term share price increases that are often not sustained over the longer term?
