The phrase "has been acquired before" is correct and can be used in written English.
It is used to indicate that something has already been acquired or obtained. Example sentence: Jane has already acquired the knowledge she needs for the job, so she has been acquired before.
Similarly, cytofluorometric methods cannot determine whether apoptotic traits (such as phosphatidylserine exposure or the collapse of the mitochondrial transmembrane potential) have been acquired before, during or after mitosis.
"There was a photograph of the griffins" — a rare fourth-century-B.C. painted marble sculpture of two griffins killing a stag, which had been acquired before True's tenure — "in the trunk of somebody's car".
Many suspect that objects that cannot be proved to have been acquired before 1970 — the cutoff date set by the Unidroit convention — will become financially worthless or exceedingly difficult to negotiate.
That means, that traffic has to be dismissed, or vice versa, additional resources could have been used if they had been acquired before.
The M. tuberculosis cases represented reactivated disease that had been acquired before 1994 and were likely to have been latent for several decades.
Moreover, most introns found in embryophyte chloroplast genes are also present in charophyte chloroplasts and had been acquired before the transition to land (Turmel et al. 2006).
Therefore, infections may have been acquired before the beginning of the screening interval, and be unnoticed due to its asymptomatic nature and lack of extra-genital testing.
Dorso-ventral subdivision of the pallium by the restricted expression of Emx1/A may thus have been acquired before the divergence between cyclostomes and gnathostomes, as proposed previously [ 41].
The distribution across the two known species, P. brasiliensis and P. lutzii, and phylogenetics analysis indicate that these elements could have been acquired before speciation occurred.
Prior to the introduction of effective screening of blood donors, blood transfusions were recognised as the leading source of HCV infection and some of these infections may have been acquired before adequate screening was introduced [ 21, 40].
Because the incubation period of listeriosis is long (11-70 dand) and fecal carriage not uncommon (5%-10%) (1, 2), colonization could have been acquired before hospitalization and infection developed in the hospital, possibly even triggered by increased immunosuppression.
