high-grade ore

例句：

1. 1. Themine produces high-grade ore,which is highly sought after by the metals industry.
   该矿生产高品位矿石，金属行业非常需要。
2. 2. Thecompany specializes in mininghigh-grade ore fromdeep underground.
   该公司专门从地下深处开采高品位矿石。
3. 3. The discovery of newhigh-grade ore deposits hasboosted the local economy.
   新发现的高品位矿石矿床促进了当地经济的发展。