iron ore pellet

例句：

1. 1. The iron ore pellets are used in the production of steel.
   铁矿石颗粒用于钢铁生产。
2. 2. The iron ore pellets are a valuable resource for metallurgy.
   铁矿石颗粒是冶金业的重要资源。
3. 3. The iron ore pellets are mined from the earth's crust.
   铁矿石颗粒从地壳中开采。