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1. Selective hydrocracking is a process used to convert heavy oil into lighter, more easily refinable fractions.
选择性加氢裂化是一种将重油转化为更易加工的轻质组分的过程。
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2. The selective hydrocracking of crude oil can significantly improve its quality and yield higher yields ofgas.
原油的选择性加氢裂化可以显著提高其质量，并提高气体产量。
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3. In the selective hydrocracking process, the feedstock is subjected to high-pressure hydrogen to break downcomplex molecules into simpler ones.
在选择性加氢裂化过程中，原料受到高压氢气的作用，将复杂的分子分解成简单的分子。