附加在一条电子传输的消息中，对其发送者进行唯一标示的数字号码。
A digital code that can be attached to an electronically transmitted message that uniquely identifies the sender.
即使是今天，只有一面面的小旗以及被喷涂的树干是唯一标示在一个特定地区行走是安全的，不必担心会踩上地雷。
Even today, small flags and spray-painted tree trunks are the only indications that it's safe to walk in a given area without fear of stepping on a landmine.
如果你关闭你的双手，你会发现，你是爱留下唯一控股标示牌。
If you close your arms about love you will find that you are left holding only yourself.
因为当时尚未发明钩状铁丝，无法树立篱笆，这是唯一能标示宝贵财产的方式。
This is the only way to indicate the ownership of the property for hook-shaped wire had not been invented at that time which made the making of fence is of impossible.
因为当时尚未发明钩状铁丝，无法树立篱笆，这是唯一能标示宝贵财产的方式。
This is the only way to indicate the ownership of the property for hook-shaped wire had not been invented at that time which made the making of fence is of impossible.
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