Delta ray
[电] σ射线
🧩 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;
ray
[rei]
n. （热或其他能量的）射线;光束，光线;微量;伞形花序柄;
vt. 放射;照射;（思想，希望等）闪现;发光;
🗣️ 情景例句
You've changed a lot since I last saw you.
自从我上次见到你以来，你改变了很多。
If he doesn't, will you wash the dishes.
如果他不，你会洗碟子吗？
It's against the law!
那是违法的！