Unobtanium
n. 电影《阿凡达》中一种罕见的常温超导体，拥有奇特的磁场
🗣️ 情景例句
I bought it in an antique shop
我在一家古董店买的，
Did the chicken come before the egg?
先有鸡还是先有蛋？
New jobs are needed because a number of people are out of work.
因为许多人没有工作，所以需要为他们提供就业机会。