Billionth
num. 第十亿个, 十亿分之一
🗣️ 情景例句
Fortunately, I found his house at once.
很幸运地，我立刻找到他家。
My friend phoned me at 10 a.m. Yesterday.
我的朋友昨天上午10点打电话给我。
Inviting the fire brigade to put out a nonexistent fire is a crude form of deception which no self-respecting student would ever indulge in.
请消防队来扑灭一场根本没有的大火是一种低级骗局，有自尊心的大学生决不会去做。