砂积矿床 shājīkuàngchuáng placer Origin Definitions Defs Strokes Stroke Words Sentences Sents 砂 shā noun sand sand; gravel; grit; small rock fragments积 積 jī verb to accumulate to amass; to store up; to gather over time矿床 礦床 kuàngchuáng mineral deposit natural accumulation of minerals in the earth's crust that is economically valuable to mine; ore bed