The phrase "are usually dependent" is correct and usable in written English.
It can be used when discussing a general tendency or characteristic of a subject that relies on something else.
Example: "In many ecosystems, species are usually dependent on one another for survival."
Alternatives: "often rely on" or "typically contingent upon".
So recipients are usually dependent on their own areas to produce the organs they need.
Clients are usually dependent on professionals to perform important tasks for them".
Schizophrenia is a chronic mental illness, and sufferers are usually dependent on family, primary caregivers in particular.
Green buildings are highly climate responsive since they are usually dependent upon natural ventilation and natural daylight.
Prices are usually dependent on the popularity of the items and how much McGraw-Hill may have to pay for reprint permissions, said Ginny Moffat, vice president for marketing and custom publishing at McGraw-Hill Higher Education.
These wall pressure cross spectrum models are usually dependent on four parameters: the reference power spectrum, the flow convective velocity, and the coherence lengths in streamwise and spanwise directions.
"We work with singers to achieve a level of independence -- things that they're usually dependent on on the stage, like the conductor," she said.
The efficacy of such vaccines is usually dependent on adequate presentation and delivery, namely, carrier/adjuvant technology.
Land use planning in a remote desert zone is usually dependent on an efficient corridor and main road network system.
However, the performance of the final design is usually dependent upon the student's ability for knowledge application.
The amount of trips is usually dependent on the amount of money that the astronomers have available for travel from their institutions or their grants.
