eluvial placer deposit残: incomplete; deficient积: amass; store up; accumulate砂矿床: placer残积砂矿: eluvial placer沉积砂矿床: sedimentary placer deposit下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:残积砂矿床，即可在微信中查询翻译
