Billionth
num. 第十亿个, 十亿分之一
🗣️ 情景例句
Sure, call me and we'll get together.
当然，给我打个电话，我们聚聚。
True praise roots and spreads.
表扬真实，根深传远。
But this does not worry me.
但我从不为此烦恼。