We need UV for our body to make Vitamin D, which is important for the function of bones, blood cells and our immune system. 我们的身体需要紫外线来合成维生素D，这种维生素对我们维持骨骼、血细胞和免疫系统的功能至关重要。 But too much UV could cause ...

Can football make you happy? 足球能使你快乐吗？ Episode 180426 / 26 Apr 2018 本集内容 Can football make you happy? 足球能使你快乐吗？ 学习要点 有关“statistics 统计数据”的词汇 边看边答 Compared to when their team wins, how much sadder is ...