Nitrourea
硝基脲
🗣️ 情景例句
Today's exchange rate is 170.8.
今天的兑换率是一百七十点八。
She began playing the violin when she was nine.
九岁的时候，她开始拉小提琴。
The sudden barking frightened Clara.
突然的狗叫声吓坏了克拉拉。