oil gas tar pitch

例句：

1. 1. The oil gas is a valuable resource for the industry.
   石油气是该行业的宝贵资源。
2. 2. The tar pitch was used to make paper in ancient times.
   煤焦油被用来制作古代的纸张。
3. 3.The oil gas is extracted from underground reservoirs.
   石油气是从地下储层中提取出来的。