Bismuthia
[医] 铋线
🗣️ 情景例句
Does he have a middle name?
他有中间名字吗？
How many pieces are you going to buy?
你要买几块？
To escape from the Earth in a rocket, one must travel at seven miles per second.
要乘坐一枚火箭飞离地球，火箭的速度要达到每秒7英里，