名词
中文翻译：Unknown
同义词：
['C-4 fractionation', 'C-4 separation', 'C-4 distillation']
例句：
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1. The process of C-4 fractionation is crucial for the purification of crude oil.
C-4分馏过程对于原油的提纯至关重要。
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2. In C-4 fractionation, the heavier components are separated from the lighter ones.
在C-4分馏过程中，较重的组分与较轻的组分分离。
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3. The C-4 fractionation process has been optimized to improve efficiency and reduce costs.
C-4分馏工艺已经优化以提高效率和降低成本。