heat fastnessheat proof quality

例句：

1. 1. The new material has excellent heat fastness, which makes it suitable for use in high-temperatureenvironments.
   这种新材料具有出色的耐热性，适合在高温环境下使用。
2. 2. To ensure the product's quality, we need to test its heat fastness under different temperatures.
   为了确保产品的质量，我们需要在不同的温度下测试其耐热性。
3. 3. The manufacturer claims that their product has excellent heat fastness, which is why it can withstand extreme conditions.
   制造商声称他们的产品具有出色的耐热性，这就是为什么它能承受极端条件的原因。