- class b certification
- b: a B picture 第二流影片。 A B ...
- 认证: attestation; authentication; ...
- a类认证: class a certification
- 认证: [法律] attestation; authentication; identification◇认证费 certification fee; 认证条款 testimonium clause; 认证遗嘱 prove a will
- a b: 酸枣仁皂甙
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