Picolinamide
吡啶酰胺, 氮苯酰胺
🗣️ 情景例句
If you don't know a person's last name, use 'ma'am' or 'sir'.
如果你不知道一人的姓， 你应称呼他为 'ma'am' 或 'sir' 。
Ellen liked to smell her mother's cooking, when she came home.
艾伦回到家来，喜欢闻一闻母亲做的菜。
It could only get over the mountains if it rose to 10,000 feet.
只有在飞至10，000英尺的高度时，它才能飞过这些山头。