Monoatomic
a. 單原子的
??? 情景例句
What about the cake?
蛋糕怎么樣？
Buck up, Billy, Enjoy yourself.
振作起來，比利，快快活活地過日子。
Then he sat there and looked at it for three hours! He didn't write a word!
然后他就坐在那里，對著考卷看了3個小時，一個字也沒寫！