怎样

zěn yàng how; why

去掉

qù diào to get rid of; to exclude; to eliminate; to remove; to delete; to strip out; to extract

无

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

痕

hén scar; traces

搜索

sōu suǒ to search (a place); to search (a database etc)

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