Billionth
num. 第十亿个, 十亿分之一
🗣️ 情景例句
Is it finished yet?
行了吗？
Snort! I didn't do anything wrong!
哼哼，我没做错什么事啊。
They had to edge their way along this, sometimes wading across shallow streams, or swimming across deep pools.
他们不得不侧着身子往前走，有时过浅溪，有时游过深潭。