refractory wool

例句：

1. 1. The farmer's refractory wool is so strong that it can withstand even the strongest washing machines.
   这位农民的难治性羊毛如此坚韧，以至于即使是最强大的洗衣机也无法将其洗净。
2. 2. The new blend of wool and silk has created a fabric that is both refractory and luxurious.
   这种羊毛和丝绸的新混合创造了一种既难治又奢华的织物。
3. 3. The refractory wool was used to make the heavy winter coats that were popular during thecolder months.
   这种难治性羊毛被用来制作冬季厚重的外套，这些外套在寒冷的季节里非常受欢迎。