Dou-Sol extraction的用法和樣例：
例句
- Itis recommended that the raffinate from fur fural extraction of coker gas oil will be a good FCC feedstock.
認為焦化蠟油糠醛精製抽余油是一種優質的催化裂化原料。 - Extraction and purification of natural surfactant lecithin were summarized, and new research progress of some processes was briefly introduced.
簡要綜述了天然表面活性劑磷脂的提取與精製工藝，並介紹了有關工藝的新進展。
