The phrase "a pair of active" is correct and usable in written English.
It can be used when referring to two items or entities that are currently functioning or engaged in an activity.
Example: "I bought a pair of active noise-canceling headphones for my travels."
Alternatives: "two active" or "a couple of active".
A combination of structural information and activity assays was used to identify a pair of active site residues that are important for mediating AlmE glycine specificity.
The catalytic activity of these proteins is driven by the Asp dyad, a pair of active site residues Asp residues participating in the hydrolysis of the substrate [ 26].
They were, in fact, a pair of active lesbians, and she loathed being shut up with them.
Nvidia's GeForce 3-D Vision kit, for example, includes a pair of active shutter glasses and a U.S.B.-connected infrared emitter.
In the test section, a single, and a pair of active delta wing VGs were placed near the leading edge of a heated plate and tested separately for their heat transfer enhancement effects using infrared thermography.
The performance of an elastocaloric cooling system with a pair of active regenerators is studied in terms of operating frequency, flow rate, geometric parameters and thermal conductivity of the material.
I've got a pair of Bose active speakers which are about the same size, and cost only slightly less than the £169 that the Play 1 goes for.
The Soros Fund Charitable Foundation also made contributions last year to a pair of politically active organizations known for their liberal advocacy.
£69.99, routeone.co.uk 9. ABK YODA DENIM Designed for climbing, but just as suitable for less adventurous endeavours, ABK has gone all out to produce a fashionable pair of active jeans.
Audio-Technica announced a new pair of active noise canceling headphones today; the ATH-ANC1 QuietPoint.
Even the tetraploid octodontid Tympanoctomys barrerae has a single pair of active NORs, although signals of the presence of rDNA clusters were detected in four chromosomes with in-situ hybridization using rDNA probes [ 41].
