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
Do you have this in other colors or sizes?
你有别的颜色或号码的吗？
Mr. Smith is a politician.He's running for election as governor.
史密斯先生是竞选州长的一名政治家。
Many people prefer living in the country to living in the town.
许多人喜欢住在农村而不喜欢住在城市。