Billionth
num. 第十亿个, 十亿分之一
🗣️ 情景例句
How good are you at using chopsticks?
你筷子用得怎么样？
To construct a building
建造大楼
for in the evening she would be going to a fancy-dress part with her husband.
因为晚上她要同丈夫一起参加一个化装舞会。