high-grade electrode

例句：

1. 1. This high-grade steel is much stronger than the standard one.
   这种高级钢材比标准钢材要强得多。
2. 2.The high-grade coffee in this store is definitely worth the price.
   这家店里的高级咖啡绝对物超所值。
3. 3. The high-grade diamonds are rare and valuable.
   这些高等级的钻石是稀有且有价值的。