weathering crust ion-adsorbed REE deposit

例句：

1. 1. The weathered crust of theancient city is a testament toits long history.
   古城的风化壳是其悠久历史的见证。
2. 2. Theion-adsorptionREE deposit in the areahas significant economic value.
   该地区的离子吸附稀土沉积物具有显著的经济价值。
3. 3.The weathering process is crucial for understandingthe formation of these deposits.
   风化过程对于理解这些沉积物的形成至关重要。