1Record (a number or amount) as being lower than it really is.
记录（数量）短缺
these victim studies also under-record the amount
Example sentencesExamples
For a variety of reasons, this type of crime is under-reported and under-recorded in the county.
The problem here is not just that imports have been growing sharply, but also that official figures may significantly under-record the strength of imports.
Military expenditures and interest payments had been serially under-recorded and the surplus recorded in the social security account had been over-stated.
These fungi are almost certainly under-recorded throughout Britain, although they are also considered to be under threat.
1.1Record (data or information) insufficiently or inadequately.
记录（数据）不足
such conditions had been markedly under-recorded in medical inspection