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

你在哪儿也找不新教练，他们就跟砂金一样难找。

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、砂金为主,其次为贝壳、球、钛铁矿、金。

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金的矿源，地表赤壤化可能是砂金形成的主要阶段。