The phrase "attained a plateau" is correct and usable in written English.
It can be used to describe reaching a stable level of performance or progress after a period of growth or improvement.
Example: "After months of intense training, she finally attained a plateau in her running speed, making it difficult to improve further."
Alternatives: "reached a standstill" or "achieved a stable level".
At 20 MPa and 333 K, the methyl morolate extraction attained a plateau at 6 h.
The percent removal of both metals Mn II) and Fe(II) increased with increase in Ash-RH dosage and attained a plateau (i.e. reached maximum amount) at 0.1 g for Fe and 0.5 g for Mn.
In particular, they attained a plateau at about 10 h and 30 h, respectively.
These "sustained bursts" activated at a threshold of −56.37 ± 1.93 mV and attained a plateau voltage of −35.19 ± 2.09 mV.
These closely resembled SNA, being characterized by repetitive 1.19 ± 0.09 s depolarizations that attained a plateau voltage of −28.84 ± 2.15 mV upon which small spikelets occurred.
Steady state current time curves show a sharp increase in the anodic current to the generation of superoxide radical and attain a plateau in ca. 6��min.
Manager Jerry Manuel found it hard, even after another worthy victory and a second consecutive series victory, to lavish praise on himself or his team for attaining a plateau of mere evenness.
Avedon's rise to eminence in his profession has been more in the nature of suddenly and effortlessly attaining a plateau than of painfully climbing to a peak of success, for he arrived pretty much where he is today when he was only twenty-two.
It is seen from the figure that the function Q(F) does not attain a plateau, this pointing to the fact that at room temperature, in the implantation dose range under study, the full saturation of the sample with deuterium is not attained.
We show (Figure 3A) that after inoculation the culture continued to grow for 8h, albeit more slowly than the mock-inoculated control flask, attaining a plateau around 1.5×107cells/ml for 10 12h, before a progressive decrease in the number of autofluorescing cells over the next 12h period.
