1. Bitumens are commonly used in the construction industry for asphalt pavement.
沥青常用于建筑行业中的沥青路面。

2. The quality of bitumens can greatly affect the durability of a road.
沥青的质量会极大地影响道路的耐久性。

3. Bitumens are also used in waterproofing applications for roofs and foundations.
沥青也用于屋顶和基础的防水应用。

4. The extraction and refining of bitumens can be a complex process.
沥青的提取和精炼过程可能会很复杂。

5. Bitumens have been used for centuries in various applications, including ship caulking.
数百年来，沥青已被用于各种应用，包括船舶补缝。

6. The production of bitumens is an important industry in many countries.
沥青的生产是许多国家的重要产业。