That little thing on your exhaust that you've probably never looked at, is a literal treasure chest full of valuable metals, platinum, palladium and this one, rhodium, the most expensive metal on planet earth.

上的那个你可能从未看过的小东西，是个名副其实的宝箱，里面装满了贵重，、钯，还有地球上最昂贵的铑。