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教练，他们就跟一样难找。

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

区域火山岩地层矿源，地表赤红壤化可能形成主要阶段。

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

山东省滨海矿以英、锆英、矿、等为主,其次为贝壳、球、钛矿、红等。