mycosterol

例句：

1. 1. The oil company's profits have been declining due to the high cost of exploration and extraction.
   由于勘探和提取成本高昂，这家石油公司的盈利一直在下降。
2. 2. The mycosterol production process is complex and requires specialized equipment.
   我的成本生产过程复杂，需要专用设备。
3. 3. The mycosterol market has been expanding rapidly in recent years, driven by increasing demand for renewable energy sources.
   近年来，由于对可再生能源需求增加，我的成本市场迅速扩大。