unseen
adj
1 not seen; invisible 未被看见的; 看不见的
I slipped from the room unseen, ie unnoticed. 我悄悄地溜出房间, 无人察觉.
2 (of a translation) done without previous preparation (指翻译)事先无准备的.
3 (idm 习语) sight unseen => sight1. unseen, n (Brit) passage for translation from a foreign language into one´s own language without previous preparation 不经准备需译成本族语的一段外文
German unseens 需当场翻译的几段德文.