Five things you probably didn’t know about periods BBC Ideas
月经影响着世界上一半人口的一生。但人们对它却知之甚少。以下是您可能不知道的关于月经的五件令人惊讶的事。
Menstruation affects half of the world’s population during their lives. But it’s little understood. Here are five surprising thing you may not know about periods.
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