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1·He perferred to die instead of stealing.

他宁死也不去偷窃。

2·For FCC resid processing, USY zeolite is perferred because of its superior hydrothermal stability, vanadium resistance and coke selectivity compared to conventional zeolites.

超稳y分子筛的水热稳定性、抗钒性能和焦炭选择性都优于传统的沸石，适合作为渣油FCC催化剂的活性主体。