英语语法分析

Residua of Temik in orange were detected by gas chromatography.

采用气相色谱分析铁灭克在柑桔上的残留动态。

So the techniques of short contact time and quick speed oil gas separation in residua catalytic cracking should be taken.

因此，渣油催化裂化宜采用短接触时间和快速油气分离技术。

The main properties of naphtha, diesel fuel fractions, catalytic cracking feed stock and residua from these crudes are also listed.

文中并列出了各种重质原油的汽油、柴油、催化裂化原料及渣油的主要性质。