yán / jiū / zhè / lèi / lì / shǐ / chēng / hu / shí / yīng / shuō / míng / ǎi / hēi / rén / dài / yǒu / míng / xiǎn / de / shí / dài / jú / xiàn

研究这类历史称呼时，应说明“矮黑人”带有明显的时代局限。

When studying such historical terms, one should explain their clear historical limitations.