Delta matal
[机] 得尔他合金
🧩 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
I'm surprised they're not here.
我奇怪他们怎么没来。
The great and the little have need one of another.
伟大与渺小相得益彰。
That's why we were getting anxious about you.
所以我们才为你们担心。