Flourosis
慢性氟中毒
??? 情景例句
Terrific!
妙極了！
How is the weather today?
今天天氣如何？氣溫多少度？
of becoming more likely to die the older we get, was something self-evident,
人隨著年齡的增長而接近死亡，這是不言而喻的，