Dien
[化] 二亚乙基三胺; 二(2-氨基乙基)胺
🗣️ 情景例句
Reading childern's literature is an excellent way for the beginning English speaker to improve.
对于刚刚开始学说英语的人，阅读儿童文学读物是个不错的方法。
He who is ashamed of asking is ashamed of learning.
耻于问者耻于学。
Hi, this is Steve. Is Pippa there?
你好。我是史蒂夫。皮帕在那吗？