The phrase "are continuously kept" is correct and usable in written English.
It can be used when describing something that is maintained or preserved over time without interruption.
Example: "The records are continuously kept in a secure location to ensure their safety and integrity."
Alternatives: "are consistently maintained" or "are regularly stored".
The nanoparticles are continuously kept in organic solvent to inhibit oxidation, and are transferred to the polymer (cellulose acetate, CA) phase as slurry.
Especially when the two of them started talking about AOL's official drinking day, which is Thursday, and when Mike asked about the internal AOL emails we are continuously kept away from.
Mortality data were extracted from the national registry kept at Statistics Netherlands, which is derived from the municipal population registries which are continuously kept up to date.
Altogether, these data indicated that NG2 cells are continuously kept functional; certain synaptic contacts are passed onto the resulting progenies during cell division.
Only qualified employees, whose knowledge is continuously kept up to date, can organize, evaluate, correlate and utilize information.
Prior to irradiation, the solution was continuously kept in dark for 30 min to reach an adsorption desorption equilibrium between organic substrates and the photocatalysts.
TRAIL-selected cells were continuously kept with 5 ng/ml TRAIL until 24 h before treatment.
Selected, green fluorescent cell clones were continuously kept in this selection medium.
Incubation was done in humid chambers at room temperature, and slides were continuously kept wet starting from this step onwards.
For rinderpest virus to remain viable during storage over long periods, the material must be continuously kept under suitable conditions.
To avoid the drought of leaves, leaf petioles were continuously kept in distilled water throughout the measurements.
