So be a bit theatrical, try cracking a few jokes.
不如戏剧性一点，开几个玩笑。
In the laboratory tests of combination process of denitrification refining and fluid catalytic cracking, a specially developed acidic chelating agent is used for denitrification refining.
介绍了焦化蜡油脱氮精制-催化裂化组合工艺的实验室研究情况。
In the laboratory tests of combination process of denitrification refining and fluid catalytic cracking, a specially developed acidic chelating agent is used for denitrification refining.
介绍了焦化蜡油脱氮精制-催化裂化组合工艺的实验室研究情况。
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