Words and expressions in para.1 (2) beyond one's ken:not known by the person concerned. e.g.Why young kids take fancy to that pop singer is beyond our ken. 冬 span :a stretch between two limits,esp.in time; period时距，期间 e.g.over a span of 10years According to some researchers,a child's span of attention is about 5 minutes
Words and expressions in para.1 (2) ❖ beyond one’s ken: not known by the person concerned. e.g. Why young kids take fancy to that pop singer is beyond our ken. ❖ span :a stretch between two limits, esp. in time; period 时距，期间 e.g. over a span of 10years ❖ According to some researchers, a child’s span of attention is about 5 minutes
Para.2 Efforts are made in this para.to prove the wisdom or the sincerity of the author's own behavior
Para. 2 Efforts are made in this para. to prove the wisdom or the sincerity of the author’s own behavior