
好词典

源自西班牙语 'placer'(沙洲/浅滩),与法语 'place'(放置)同源,18世纪进入英语。
❶ 指放置或安置某物的人或工具,也指在比赛中获得名次的选手。在矿业中特指含有金砂等矿物的冲积层。
“He worked as a placer in the furniture assembly line.”
(他在家具装配线上担任放置零件的工作。)
“The top three placers received medals in the competition.”
(比赛前三名的选手获得了奖牌。)
placer mining — 指从河流冲积层中开采金、铂等贵金属的采矿方式,通过水流自然分离矿物。
“Placer mining was common during the California Gold Rush.”
(砂矿开采在加利福尼亚淘金热时期很常见。)