141 sentences for 箱 (xiāng — container) — page 8 of 8

141. 它们就像黑箱，其内部运作是神秘的。

     tā​men jiù xiàng hēi​xiāng, qí nèi​bù yùn​zuò shì shén​mì de.

     They are like black boxes whose inner workings are mysterious.

     Source: CCMatrix