Delta acid
[化] δ酸; 2-萘酸-7-磺酸(染料中间体)
🧩 词语组成解析
delta
['deltə]
n. 希腊语字母表第四字母δ;（河流的）三角洲;[数]变量增量;
🗣️ 情景例句
OK. I understand. Thank you.
好吧，我懂了，谢谢你。
His hand is swollen, Does it hurt?
他的手肿起来了，疼不疼？
In the morning, Mr.Sawyer goes to work and the children go to school.Their father takes them to school every day.
早上，索耶先生去上班，孩子们去上学。父亲每天送孩子们去上学。