求翻译：其稳定性提高、耐热和抗化学稳定性增强,氢转移反应活性降低,因此它的产物中烯烃含量增加、汽油辛烷值提高、焦炭产率降低是什么意思？

Increase their stability, heat resistance and chemical stability, enhanced hydrogen transfer reaction activity decreased, so it's a product of the olefin content increased, increase octane, reduce coke yield

Its stability increase, heat and chemical stability, enhanced reactive lower hydrogen transfer reactions, and therefore its product with polyolefin content in increasing awareness, octane rating of gasoline, coke output reduction rate

Its stability enhances, heat-resisting and the anti-chemical stability strengthens, hydrogen transfer reactions activeness reduces, therefore in its product the alkene content increases, the gasoline octane rating enhances, the coke yield reduces

Improve its stability, thermal and chemical stability resistance enhanced hydrogen transfer reaction activity of lower olefin content in its products increased, improving octane number of gasoline, coke yield lower

Its stability is improved, been heat-resisting and resisted the chemical stability to strengthen, hydrogen shifts and reflects the activity to reduce, so the alkene content increases, hard alkane value of petrol is improved, the coke yield is reduced in its product