vitamine B↓1↓2b-zinc tannate complex

例句：

1. 1. The patient's blood tests showed that he was deficient in vitamin B12.
   患者的血液测试显示他缺乏维生素B12。
2. 2. The doctor prescribed a vitamin B12 zinc tannate complex to help the patient recover.
   医生开了一种维生素B12锌鞣酸复合物来帮助病人恢复。
3. 3. The research team discovered a new way to synthesize vitamin B12 zinc tannate complex.
   研究小组发现了一种新的合成维生素B12锌鞣酸复合物的方法。