primary pearlite

例句：

1. 1. The primary pearlite in the steel is what gives it its hardness and strength.
   钢铁中的初级珠光体赋予了它硬度和强度。
2. 2. The manufacturing process of this material involves the use of primary pearlite to produce high-quality products.
   这种材料的制造过程涉及到使用初级珠光体来生产高质量的产品。
3. 3. Due to the presence of primary pearlite, the steel has excellent wear resistance and corrosion resistance.
   由于存在初级珠光体，这种钢具有极好的耐磨性和耐腐蚀性。