placer /'pleisә/ 📖 中文释义 n. 砂矿, 砂矿开采地, 放置者, 得名次者 🧩 词形变化 复数 placers 📘 English Definition(英文释义) n. an alluvial deposit that contains particles of some valuable mineral ← placentotoxin P 字母词表 placer miner →