Indolal
吲哚醛
🗣️ 情景例句
Fifteen minutes! Thank you. Good-bye.
十五分钟 ！谢谢 。再见。
Let me lend it to you.
让我借给你。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？