2 sentences

1. 那名失踪者的下落至今仍然不详。

   nà míng shī​zōng zhě de xià​luò zhì​jīn réng​rán bù​xiáng.

   The whereabouts of the missing person remain unknown.

   Source: Dong Chinese Dictionary

2. 史料对这位历史人物的记载极其不详。

   shǐ​liào duì zhè wèi lì​shǐ rén​wù de jì​zǎi jí​qí bù​xiáng.

   Historical records of this figure are extremely sketchy.

   Source: Dong Chinese Dictionary