The phrase "a major phase in" is correct and usable in written English.
It can be used to describe an important stage or step in a process, development, or project.
Example: "The launch of the new product represents a major phase in our company's growth strategy."
Alternatives: "a significant stage in" or "a critical step in".
The predominant crystalline mineral phases identified in these samples were quartz (classified as a major phase in 14 of 15 samples analyzed and as minor in 1 of 15), illite (10/15 major, 3/15 minor, 1/15 trace, and 1/15 non-detect), pyrite (2/15 major, 7/15 minor, 1/15 trace, and 5/15 non-detect), and calcite (6/15 major, 2/15 minor, and 7/15 non-detect).
Raglan Castle was built in several phases, initial work occurring in the 1420s and 1430s, a major phase in the 1460s, with various alterations and additions at the end of the 16th century.
Dates from both surface offerings and corals in architecturally integral contexts (placed in situ during temple construction) strongly agree in documenting a major phase of temple construction in Kahikinui beginning ca. A.D. 1550 and continuing until ca. A.D. 1700.
In the 1970s, a major phase of R&D reform in England followed the 1971 Rothschild Report [ 56].
In the neonatal period a major phase of gliogenesis occurs in the ventricular and sub-ventricular zones and it is likely that there is a significant effect from hydrocephalus on developing glial cells, but less effect on the post-mitotic neurones produced prenatally [ 29- 32].
The effect of nucleation and plasticization on the stereocomplex formation between poly l-lactic acid) (poly l-lacticy(d-lacidc acid) (PLLA) wandinvestigated in blends where poly d-lactic as a minor poly d-lacticjor phacidof PDLA.
One can therefore reasonably conclude that a major phase of drug development in breast cancer endocrine therapy is drawing to a close.
Background: Glutathione S-transferase (GST) P1 is a major phase II xenobiotic-metabolizing enzyme in the human lung.
We continue to expect higher prices in continuance of the normal recovery until the beginning of the new year but think this may well be followed by renewal of the recession, perhaps in a major phase.
Testing, which is a major phase that takes a significant time in the overall life cycle, can be optimized if the testability of the software can be evaluated.
