砂金

1.You can’t get those new trainers anywhere. They’re like gold dust.

你在哪儿也找不到那些新，们就跟砂一样难找。

2.Regional volcanic strata are the source of placer gold and laterization process is the main stage of formation of placer gold.

区域火山岩地层是砂矿源，地表赤壤化可能是砂形成主要阶段。

3.Quartz, zircon, magnetite, gold are major constituents of littoral placers in Shandong province, while shell, ballstone, ilmenite, rutile being secondary.

山东省滨海砂矿以英、锆英、磁铁矿、砂等为主,其次为贝壳、球、钛铁矿、等。