聚醚是水-乙二醇难燃液压液的主要成分之一。
The synthetic polyethers meets the technical requirements of hydraulic fluid and quality stability of the product is better.
与烟煤相比，无烟煤具有着火难、难燃烬的特点。
Compared with bituminous coal, anthracite coal is much more difficult to take fire and combust completely.
当用尽碳水化合物时，您的身体不得不使用难燃的脂肪。
When you run out of carbohydrates, your body needs to move on to burning fat which is a lot tougher.
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