hydrogenation of tar

例句：

1. 1. The processof hydrogenating tar is essential for theproduction of synthetic rubber.
   氢化焦油的过程对于合成橡胶的生产至关重要。
2. 2. The hydrogenation of tar is a complex chemical reactionthat requires careful control to avoid undesirable byproducts.
   焦油的氢化是一个复杂的化学反应，需要仔细控制以避免不希望的副产品。
3. 3. In the hydrogenation of tar, the carbon-carbon double bonds are broken down into smallermolecules, which can then be further processedinto useful chemicals.
   在焦油的氢化过程中，碳碳双键被分解成更小的分子，这些分子可以进一步加工成有用的化学物质。