其内 qínèi inside Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 它们就像黑箱,其内部运作是神秘的。 tāmen jiù xiàng hēixiāng, qí nèibù yùnzuò shì shénmì de. They are like black boxes whose inner workings are mysterious. Source: CCMatrix