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
When will the delivery be possible?
可以在什么时候交货？
He knows much who knows how to hold his tongue.
懂得缄默的是明白人。
so they insured it for the trip.
于是，他们对这只盘子的运输安全投了保。