yǐn / shēng / zhòu / shí / qī / de / dì / céng / zhōng / míng / xiǎn / kě / jiàn / de / huà / shí / xiāng / duì / jiào / shǎo隐生宙时期的地层中,明显可见的化石相对较少。In strata from the Cryptozoic, readily visible fossils are relatively scarce.