The phrase "active during the first" is correct and usable in written English.
It can be used to describe a state of being engaged or functioning within a specific initial time frame or period.
Example: "The system was active during the first phase of the project, allowing for real-time data collection."
Alternatives: "engaged in the initial" or "functioning in the first".
The glottic closure reflex is elicited at birth, becomes more active during the first year of life, and gradually decreases in activity with further aging [ 51].
Laybourne, 68, is Clinton's age and, like the woman for whom she held that lunch the other day, became politically active during the first wave of feminism.
PayPal has 12.8 million account holders, with about half its accounts having been active during the first half of 2001, according to company documents.
The Jets have been very active during the first few days of the N.F.L.'s free-agency period, which officially began on Wednesday.
A new CD featuring three seldom-encountered works by Arthur Honegger, a Swiss composer active during the first half of the 20th century, has the opposite effect.
To people such as Batarseh, a Christian physician who became politically active during the first Palestinian uprising in the late 1980s, Hamas's rise undermines the Arab nationalist dream that is also withering in Egypt, Syria, Iraq and elsewhere as the influence of religious movements grows.
This article presents analyses of the Groupe interdisciplinaire d'Archéométrie de "Université de Liège (Belgium) for three paintings attributed to Henri Bles, a Mosan landscape painter active during the second third of the 16th century (i.e., second generation of landscape painters).
Like many transplanted Southerners, George worked at U.S. Steel, which was particularly active during the Second World War and attracted not only American blacks but also displaced Europeans: Poles, Greeks, and Italians.
His correspondence mentions the other leading philosopher conventionally included among Florentine Neoplatonists, Giovanni Pico della Mirandola, more frequently but not often, and in almost all of these cases, the name appears merely in a list of Hellenists active during the fifteenth century.
The 824th Tank Destroyer Battalion was a tank destroyer battalion of the United States Army active during the Second World War.
