The strong acid is the active site for creaking para-diethylbenzene and ethylbenzene and it has little effect on p-isomer selectivity of disproportionation and isomerization.
强酸位是对二乙苯和乙苯裂化的活性中心，而对歧化和异构化反应生成对位异构体的选择性影响不大。
2
I save the trouble of saying what I mean by that by recording transference in accordance with the system I suggested earlier (p. 40, para. 6).
在此我的意思是依照我之前建议的系统(本书第49页第6节)记录转移关系。
3
The expression level of TIMP-2 in lung cancer tissue was lower than that in para-cancer tissue(P<0.001), there was no significant difference between various pathological types of lung cancer(P<0.05);