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

你在哪儿也找不到那些新教，就跟砂一样难找。

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的矿源，地表赤红壤化可能是砂形成的段。

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

山东省滨海砂矿以石英、锆英石、磁铁矿、砂等为,其次为贝壳、球石、钛铁矿、红石等。