unrecorded
adjective uk/ˌʌn.rɪˈkɔː.dɪd/ us/ˌʌn.rɪˈkɔːr.dɪd/
未留下记录的
not written about before, and therefore not known about
Patterson discovered the previously unrecorded animal in 1999. 帕特森在1999年发现了过去未记载的动物。
（声音或影像）未录制下来的
(of sounds or moving pictures) not recorded on electronic equipment
The singer told fans he had a new unrecorded song to try out on them. 歌手告诉他的歌迷，他有一首尚未录制的新歌向他们试唱。