Billionth
num. 第十亿个, 十亿分之一
🗣️ 情景例句
I'd like an advance copy of the book, though,
但我想要一本新书的试印本
Really? I was introduced to her just last weekend.
真的？上周末我才被介绍给她。
I don't like to be late. We begin classes at 8:00.
我不喜欢迟到。我们八点上课。