浏览器

liú lǎn qì browser (software)

无

wú not to have; no; none; not; to lack; un-; -less

痕迹

hén jì vestige; mark; trace

怎么

zěn me how?; what?; why?

zěn me variant of 怎麼|怎么[zen3 me5]

恢复

huī fù to reinstate; to resume; to restore; to recover; to regain; to rehabilitate

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