bó wù guǎn / zhǎn chū / de / shā jīn / yàng pǐn / lái zì / dāng dì / hé liú / cháng qī / chōng jī / xíng chéng / de / kuàng céng

博物馆展出的沙金样品，来自当地河流长期冲积形成的矿层。

The placer gold specimen on display at the museum came from an ore deposit formed by long-term sedimentation in local rivers.