Billionth
num. 第十亿个, 十亿分之一
🗣️ 情景例句
I don't know what-to do.
我不知道怎么做。
Do you have any comments to make on the recent developments.
你对最近事态的发展有什么评论吗？
I see, I'll look into it for you.
哦！这件事我会查明的。