The root problem is that today's parents are the first in history with no memory of the maiming and killing caused by polio, tetanus, diphtheria or measles.

  • 根本问题在于,这一代父母们不知道脊髓灰质炎、破伤风、白喉、麻疹对人类的戕害,在历史上这是第一次。

  • 互联网摘选 2025-01-20 12:31:29

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