The man whom the two girls fall in love with acts more like a *catalyst for the *deterioration and restoration of their friendship.
两个女孩同时爱上的那个男生，更像是破坏和重塑她们友谊的催化剂。
With extension of reaction time, the coking tends to be saturated and a little increase in coking will lead to a significant deterioration of catalyst performances.
随反应时间的延长，催化剂结焦量趋于饱和，此后，少量增加的结焦即能引起催化剂性能的显著降低。
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