Delta system
[电] 角接系统
🧩 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
He has realized how precious health is.
他已经体会到健康的可贵。
The ground around here is stony and not very good for farming.
在这里附近的地多石做为耕作不很好的。
However, Susan has not really made up her mind yet.
然而，苏珊却还没有决定。