Dien
[化] 二亚乙基三胺; 二(2-氨基乙基)胺
🗣️ 情景例句
How did you get on in your exam?
你考得怎样？
How much?How many?
共多少？
His few material possessions make it possible for him to move from place to place with ease.
他几乎没有什么财产，这使他能够轻松自如地在各地奔波。