The phrase "a secondary and a" is grammatically correct and can be used in written English.
It can be used when listing or describing two items or concepts, where one is secondary to the other.
Example: "In our analysis, we identified a primary goal and a secondary and a supporting objective that will help us achieve success."
Alternatives: "a secondary and a supplementary" or "a secondary and an additional".
Some trusts control only one school, but more include a secondary and a group of feeder primaries, or a group of local primaries that want to work together, such as the Coastal Alliance foundation trust in Kent, formed earlier this year.
The Earth has a primary, a secondary and a tertiary ozone layer, all of which are shown in Fig. 4a, b.
Here, using hole arrays in silicon as a secondary and a fine mesh grid as an initial support, we experimentally designed a mobile nanoporous graphene membrane with tunable salt rejection and water permeation by favourably limiting the undesired effects of defects and holes on the graphene.
That concept was extended to include the replacement of the primary chromosome by two tertiary chromosomes, or by a secondary and a tertiary chromosome [38].
Two-centre study, from a secondary and a tertiary neonatal intensive care unit.
We chose to compare two obstetric clinics at a secondary and a tertiary level hospital in the same region of Sweden.
Schools have an important role in teacher education which is why two-thirds of a secondary and half of a primary teacher training course take place in schools.
The manager directed an undercover researcher to a secondary and unregistered yard.
The immune reactivity seems to be a secondary and presumably an indirect effect.
A Kangaroo Unit sector and a Nursery sector in a secondary and tertiary care at a mother-child hospital in Recife, Brazil.
After you've decided what kind of player you are, you need to get a primary gun, a secondary, and sometimes a third weapon.
