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1·He retained that obsessiveness and excitement, never growing out of them.

他乐此不疲、兴奋异常、从不言弃。

2·This obsessiveness has even led to violent consequences. Last week, police in France said that they had thwarted a plot by a boy, 13, to murder his school teachers.

这种痴迷甚至导致暴力性后果，法国警方上周表示，他们挫败了一个13岁男孩企图谋害本校老师的阴谋。