1.You can’t get those new trainers anywhere. They’re like gold dust.
你在哪儿也不到那些新教练,他们就跟砂金一样难。
2.Regional volcanic strata are the source of placer gold and laterization process is the main stage of formation of placer gold.
火山岩地层是砂金矿源,地表赤红壤化可能是砂金形成要阶段。
3.Quartz, zircon, magnetite, gold are major constituents of littoral placers in Shandong province, while shell, ballstone, ilmenite, rutile being secondary.