extreme hard material

• 超硬材料

extreme hard material的用法和样例：

例句

1. Hardness is one of the main characters of ultrahard material sinters.
   硬度是衡量超硬材料烧结体的主要特性之一。
2. Exacting tolerances where soft and hard materials meet show quality that to this date we haven't seen in a Ford.
   严格公差在软，硬材料满足查看质量，为了这一天我们还没有看到在福特。