Dach
[医][=diamino-cyclohexane]二氨基环己烷
🗣️ 情景例句
Will your family be attending the graduation ceremony?
你的家人要来参加你的毕业典礼吗？
Write it on your heart every day is the best day of the year.
要记住，每天是一年中最好的一天。
You've got lots of old buildings in your country.
你们国家有许多古老的建筑物。