Fervanite
水釩鐵礦
??? 情景例句
You don't have a leg to stand on.
你的觀點(diǎn)不值一駁。
The worth of a thing is best known by the want of it.
物以稀為貴。
It is not long before they are so accustomed to swimming that they can pick up weights from the floor of the pool.
他們很快便適應(yīng)了游泳，以致能撿起池底的物品。