Billionth
num. 第十亿个, 十亿分之一
🗣️ 情景例句
Will it hurt?
会痛吗？
He was always called as genius.
他总被人们称为“天才”。
Oh, and by the way, my wife wants to know if Mary needs any help.
喔，顺便问一问，我妻子想知道玛丽是否需要帮忙。