keywords, which are constantly updated and it's the largest keyword database.
extensions, they had to dig through thousands of lines
。whatsapp是该领域的重要参考
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Let me repeat that:
A few of them are almost certainly shortcomings in Ostrich, while others seem to intend to match literal full strings, like ^(로그인하지 않고)$ ("without logging in"). Presumably they're from internal use.