The phrase "achieved only a marginal" is correct and usable in written English.
It can be used to describe a situation where a goal or result has been reached, but the extent of that achievement is minimal or insignificant.
Example: "The project was completed on time, but it achieved only a marginal improvement in efficiency."
Alternatives: "attained just a slight" or "reached merely a minimal".
For the sample as a whole (men and women combined), baseline TL weakly predicted CVD mortality, a relationship which achieved only marginal statistical significance, p <.10.
The company achieved only marginal success until the early years of World War II, when the demand for textiles in particular, parachutes reached a peak.
However, this association achieved only marginal significance (p < 0.07).
Since even large GWAS achieve only marginal evidence for association for many causal variants, PRS are usually calculated at a set of P-value thresholds, e.g. P T = 1 × 10 − 5, 1 × 10 − 4, …, 0.05, 0.1, …, 0.5.
With around $1tn a year still flowing out of developing countries to tax havens, it is clear that coaxing these territories into increased transparency can achieve only marginal gains.
Fojo and Grady [ 11] as well as Smith and Hillner [ 12] have argued that the spiraling cost of cancer care, and particularly cancer therapeutics that achieve only marginal benefits, pose the need for guidance from oncologists about how to address these costs.
She is seeking to rally activists' spirits following a disappointing general election performance in which Plaid only achieved a marginal increase in its vote share.
Those cell lines initially bearing a methylated DKK3 promoter showed elevated DKK3 mRNA expression after treatment (BT20, MCF7, MDA-MB231, T47D and ZR75-1; Figure 2b), whereas no DKK3 mRNA gain was achieved in unmethylated MCF12A and only a marginal DKK3 mRNA gain in SKBR3 cells.
However, only a marginal gain is achieved for the right filter block.
From a pure thermodynamic analysis only a marginal performance benefit is achieved for high temperature cases with the working fluids under consideration.
