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1个用户代理
2 用户代理
1和2对比一下就不一样了。我怀疑破折号有些不同,但我不知道为什么(在线差异:https ://www.diffchecker.com/uRuANqCI )
差异的左侧以ZERO WIDTH NO-BREAK SPACE' (U+FEFF). 其余的字符串是相同的。特别是那些破折号字符是相同的。
ZERO WIDTH NO-BREAK SPACE' (U+FEFF)