The phrase "a second system was" is correct and usable in written English.
It can be used when discussing the existence or introduction of an additional system in a particular context, such as technology, processes, or methodologies.
Example: "In the analysis of the project, it was noted that a second system was implemented to improve efficiency."
Alternatives: "an additional system was" or "a supplementary system was".
A second system was based on a commercial aeronautic formulation specially designed for the infusion process.
A second system was designed to examine protein prenylation of endogenously expressed proteins.
In Canada, Toronto opened a subway in 1954; a second system was constructed in Montreal during the 1960s using Paris-type rubber-tired cars.
A Second System Is Prepared Admiral Allen said Monday that a second system was being prepared that would use pipes and other equipment installed for the failed "top kill" effort to collect oil from the well.
Furthermore, a second system was designed to extend the study of near-field communication to include a bidirectional link as well as to correct the deficiencies of the first system that included problems with noise and parasitic oscillations.
On November 9, a second system was detected northeast of Bermuda with a pressure of 1005 mbar (hPa; 29.68 inHg), though it remained unclear whether the two systems were related.
A second system is outfitted with a 384-well pipet tips head, and is used within a biosafety cabinet for sterile, large-scale library plating and reformatting.
A second system is being prepared that would use the pipes and other equipment installed for the failed "top kill" effort two weeks ago to collect oil from the well.
A second system is working with a Si photodiode coupled with Ge and a GaAsP photodiodes and two long-pass dichroic filters of 600 nm and 950 nm cut-off in cascade.
A second system is expected Friday, bringing the risk of mudslides.
A second system is related to the major gene or gene complex Q [ 9, 10] located in the long arm of the chromosome 5A which governs the free-threshing character and square spike phenotype.
