Unobtanium
n. 電影《阿凡達》中一種罕見的常溫超導體，擁有奇特的磁場
??? 情景例句
We usually ship the goods by regular liners.
我們一般是定期班輪裝運貨物。
He skinned his knee.
他擦破了膝蓋的皮。
Why isn't Mrs. Lee's cat catching the mice?
李太太的貓為何不在抓這些老鼠呢？