一级

yī jí first class; category A

目录

mù lù catalog; table of contents; directory (on computer hard drive); list; contents

二级

èr jí grade 2; second class; category B

目录

mù lù catalog; table of contents; directory (on computer hard drive); list; contents

怎么

zěn me how?; what?; why?

zěn me variant of 怎麼|怎么[zen3 me5]

填

tián to fill or stuff; (of a form etc) to fill in

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