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
Well, he's asleep--finally.
好了， 他终于睡着了。
Do you often do composition after school?
你常常在放学后做作文吗？
I asked Wei Hua this question: Do you enjoy work? Yes, I do, she answered. I like to keep busy!
“你喜欢劳动吗？” “是的，我喜欢，”她回答，“我喜欢忙个不停！”