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
Is this machine washable?
这能机洗吗？
At Xmas time, Debra began to dream of all the presents.
到了圣诞节的时际，黛布拉开始梦想着所有的礼物。
Oh, and by the way, my wife wants to know if Mary needs any help.
喔，顺便问一问，我妻子想知道玛丽是否需要帮忙。