His estimate of half a million HIV positive cases was based on an extrapolation of the known incidence of the virus.

  • 他估计有50万个HIV阳性病例,这是根据已知的病毒感染率作出的推论。

  • 《柯林斯高阶英汉双解学习词典》 2025-01-18 13:27:38

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