certificate e of origin 产地证明书 ; 产地来源证 ; 原产地证书
Inspection E Certificate of Origin 产地检验证书
origin of E-sports 电子竞技运动起源
e of origin
原点E
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The problem arises because the SPF system only works out if e-mail comes from its claimed place of origin.
BBC: NEWS | Technology | Spammers exploit anti-spam trap
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