high-grade dyestuff

例句：

1. 1.The high-grade steel is used forbuilding bridges and tunnels.
   这种高级钢材用于建造桥梁和隧道。
2. 2. The high-grade coffee beans are sourced froma premium region.
   这些高品质的咖啡豆来自一个优质产区。
3. 3. The high-grade diamonds are highly sought after by collectors.
   这些高级别的钻石被收藏家们高度追捧。