The phrase "are partly missing" is correct and usable in written English.
It can be used to describe something that is incomplete or lacking certain elements.
Example: "The documents submitted for review are partly missing, which may delay the approval process."
Alternatives: "are somewhat absent" or "are not fully present".
In the specific case of Paks Nuclear Power Plant NPPP) the designer made time-limited ageing analyses that are partly missing, partly inadequate because of the lack of proper documentation or obsolete.
"One of those challenges is the timeliness of the report, in the sense that sometimes there are partly missing data.
The SATlotyper algorithm is able to handle incomplete data sets where SNP sites are partly missing, without bringing in unjustified assumptions.
Mothers whose partner's information was partly missing and (especially) totally missing tended to be younger, of black race, unmarried, with less education, smoking cigarette during pregnancy, and with inadequate prenatal care.
But only to note two remarkably honest people would be partly missing the point; Ms. Miller's trusted presence also provides a lesson.
Still, Runnicles showed an instinctive understanding of Britten's tempos and idiom; in particular, he conjured the wide-open, lonesome atmosphere that was partly missing from Doyle's staging.
Strikingly, in Atf2−/− brains, hypoglossal and facial motoneurons stained with the motoneuron-specific markers choline acetyltransferase (ChAT), and Islet-1 (Isl-1), were partly missing (Figure 1D and E) and abducens motoneurons were completely absent (see below).
Secondary wood heating is partly missing from the estimates although it is a substantial proportion of the current emissions.
Of the ten females, recordings were partly missing for two females (A1: 19.5-27 h after birth; B4 36 60 h after birth).
MI is a flexible method when it comes to advanced relationships between variables and when more than one variable is partly missing at a time.
