phosphatic nodule

例句：

1. 1.The patient's condition improved significantly after the surgery.
   手术后，患者的病情显著好转。
2. 2. The phosphatic nodule is a common mineral deposit in the earth's crust.
   磷灰石是地球地壳中常见的矿物沉积物。
3. 3. The discovery of this phosphatic nodule has led to further research into its potential applications.
   这种磷灰石结节的发现促使人们进一步研究其潜在的应用价值。