Gravitino
n. [核]引力微子(一種假設(shè)的基本粒子)
??? 情景例句
He had an emergency.
他有緊急事情。
When the tree is fallen, every one runs to it with his axe.
大樹一倒下，人人持斧來(lái)。
Nice to meet you too! What class are you in?
我也很高興。你是哪班的？