ADJ [ADJ n, verb-link ADJ, ADJ after verb]未被正式记录的 You use unrecorded to describe something that has not been written down or recorded officially, especially when it should have been. 未被正式记录的
The statistics don't reveal of course unrecorded crime.
这项统计数据显然没有披露未登记的罪案。
Much of Poland's private industry goes unrecorded.