好坏 zhe me kan s s c i qi kan hao huai
zhe me zai s c i e n c e li cha qi kan
发表论文 guo jia ji qi kan lun wen zen me fa biao shuo shuo
变压器 bian ya qi qi kan wei shi me zhe me shui
核心 he xin qi kan wei shi me zhe me nan fa
怎么这么 he xin qi kan zen me zhe me nan tou ne