Delta bond
[化] δ键
🧩 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
to have a family and grandchildren.
拥有一个家庭和孙子们。
Don't make it any worse than you can help.
尽量不要把事情弄得更糟。
Not only are the means of arriving at the holiday paradise entirely within one's own command and keeping,
完全在自己掌握之中的私人汽车不仅是到达假日天堂的工具，